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→Version history: add 4.6 counts with a ref
One page just for one short table?! NOOO, it is harmful for editors, readers, and WP || merged to its main article at OpenBSD#Releases, same as OpenSUSE version history which was created by me on 30 October 2016‎ but two days ago I merged it to its main article without any request -- see also NetBSD#Releases
 
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#REDIRECT [[OpenBSD#Releases]]
{{Use dmy dates|date=June 2016}}
==Version history==
The following table summarizes the version history of the '''[[OpenBSD]]''' [[operating system]].
{{Version |t |show=11101}}
{| class="wikitable"
|-
! Version
! Release date
! Supported until
! Significant changes
|-
| {{Version |o |1.1}}
| 18 October 1995
|
|
* OpenBSD [[Concurrent Versions System|CVS]] repository created by [[Theo de Raadt]].<ref>{{cite web|title=Undeadly|url=http://undeadly.org/cgi?action=article&sid=20061019013207|accessdate=9 October 2018}}</ref>
* While the version number used at this stage was 1.1,{{efn|Compare [[NetBSD#Releases|release history of NetBSD]], which OpenBSD branched from}} OpenBSD 1.1 was not an official OpenBSD release in the sense which this term subsequently came to be used.


{{Rcat shell|
|-
| {{Version |o |1.2}}
{{R from merge}}
}}
| 1 July 1996
|
|
* Creation of the <code>intro(9)</code> man page, for documenting kernel internals.
* Integration of the <code>update(8)</code> command into the kernel.
* As before, while this version number was used in the early development of the OS, OpenBSD 1.2 was not an official release in the subsequently applicable sense.

|-
| {{Version |o |2.0}}
| 1 October 1996
|
|
* The first official release of OpenBSD,<ref>{{cite web|title=Changes|url=http://www.openbsd.org/plus.html|archiveurl=https://web.archive.org/web/19971018165539/http://www.openbsd.org/plus.html|archivedate=9 October 2018}}</ref><ref>{{cite web|title=OpenBSD 2.0|url=http://wolfram.schneider.org/bsd/ftp/releases/OpenBSD-2.0|accessdate=9 October 2018}}</ref> and also the point at which [[XFree86]] first recognized OpenBSD as separate from [[NetBSD]].
* Initial integration of the [[FreeBSD ports]] system.
* Replacement of [[Gawk (GNU package)|gawk]] with the [[AT&T]] [[awk]].
* Integration of [[zlib]].
* Added [[sudo]].

|-
| {{Version |o |2.1}}
| 1 June 1997
|
| Replacement of the older sh with [[pdksh]].<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/21.html|accessdate=9 October 2018}}</ref>

|-
| {{Version |o |2.2}}
| 1 December 1997
|
| Addition of the <code>afterboot(8)</code> man page.<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/22.html|accessdate=9 October 2018}}</ref>

|-
| {{Version |o |2.3}}
| 19 May 1998
|
| Introduced the ''haloed daemon'', or [[BSD Daemon|aureola beastie]], in head-only form created by Erick Green.<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/23.html|accessdate=9 October 2018}}</ref>

|-
| {{Version |o |2.4}}
| 1 December 1998
|
| Featured the complete ''haloed daemon'', with [[trident]] and a finished body.<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/24.html|accessdate=9 October 2018}}</ref>

|-
| {{Version |o |2.5}}
| 19 May 1999
|
| Introduced the Cop daemon image done by Ty Semaka.<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/25.html|accessdate=9 October 2018}}</ref>

|-
| {{Version |o |2.6}}
| 1 December 1999
|
| Based on the original [[Secure Shell|SSH]] suite and developed further by the OpenBSD team, 2.6 saw the first release of [[OpenSSH]], which is now available standard on most Unix-like operating systems and is the most widely used SSH suite.<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/26.html|accessdate=9 October 2018}}</ref>

|-
| {{Version |o |2.7}}
| 15 June 2000
|
| Support for SSH2 added to OpenSSH.<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/27.html|accessdate=9 October 2018}}</ref>

|-
| {{Version |o |2.8}}
| 1 December 2000
|
| <code>isakmpd(8)</code><ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/28.html|accessdate=9 October 2018}}</ref>

|-
| {{Version |o |2.9}}
| 1 June 2001
|
|
<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/29.html|accessdate=9 October 2018}}</ref>
|-
| {{Version |o |3.0}}
| 1 December 2001
|
|
''E-Railed (OpenBSD Mix)'',<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/30.html|accessdate=9 October 2018}}</ref> a [[Techno music|techno]] track performed by the release mascot ''Puff Daddy'', the famed rapper and political icon.
* After license restrictions were imposed on [[IPFilter]], the [[PF (firewall)|pf]] packet filter was developed. pf is now available in [[DragonFly BSD]], [[NetBSD]] and [[FreeBSD]].

|-
| {{Version |o |3.1}}
| 19 May 2002
|
| ''Systemagic'',<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/31.html|accessdate=9 October 2018}}</ref> where ''Puffy, the Kitten Slayer'', battles evil [[script kitties]]. Inspired by the works of [[Rammstein]] and a parody of [[Buffy the Vampire Slayer (TV series)|Buffy the Vampire Slayer]].
* First official remote security hole - OpenSSH integer overflow<ref>{{cite web|title=Errata|url=https://www.openbsd.org/errata31.html#sshderrata31&nbsp;006|accessdate=9 October 2018}}</ref>

|-
| {{Version |o |3.2}}
| 1 November 2002
|
| ''Goldflipper'',<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/32.html|accessdate=9 October 2018}}</ref> a tale in which ''James Pond, agent 077'', super spy and suave lady's man, deals with the dangers of a hostile internet. Styled after the orchestral introductory ballads of [[James Bond]] films.

|-
| {{Version |o |3.3}}
| 1 May 2003
|
|
''Puff the Barbarian'',<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/33.html|accessdate=9 October 2018}}</ref> born in a tiny bowl; Puff was a slave, now he hacks through the C, searching for the [[AMD64|Hammer]]. It is an 80s rock-style song and parody of [[Conan the Barbarian]] dealing with open documentation.
* In 2003, code from [[ALTQ]], which had a license disallowing the sale of derivatives, was [[Software relicensing|relicensed]], integrated into pf and made available in OpenBSD 3.3.
* First release adding the [[W^X]] feature, a fine-grained memory permissions layout, ensuring that memory which can be written to by application programs can not be executable at the same time and vice versa.

|-
| {{Version |o |3.4}}
| 1 November 2003
|
|
''The Legend of Puffy Hood'' where ''Sir Puffy of Ramsay'',<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/34.html|accessdate=9 October 2018}}</ref> a freedom fighter who, with Little Bob of Beckley, took from the rich and gave to all. Tells of the [[POSSE project]]'s cancellation. An unusual blend of both [[Hip hop music|hip-hop]] and medieval-style music, a parody of the tale of [[Robin Hood]] intended to express OpenBSD's attitude to free speech.
* i386 platform switched executable format from [[a.out]] to [[Executable and Linkable Format]]
* The GPL licensed [[gzip]] was replaced by retooling the existing [[compress]] tool to include its functionality.
* The GPL licensed [[grep]] was replaced with [[JamesHoward:FreeGrep|FreeGrep]], an updated BSD licensed grep. This new grep is now also available in NetBSD.
* A public domain [[diff]] was updated and used to replace the GPL licensed diff previously included.
* Code from the [[GNU Lesser General Public License|LGPL]] licensed <ref>{{cite web|title=p0f|url=http://www.stearns.org/p0f/p0f|accessdate=9 October 2018}}</ref> was relicensed to allow pf to feature passive operating system detection.
* [[Address space layout randomization]] (ALSR) by default<ref name="OpenBSD_Innovations-ASLR-PIE">{{cite web|title=OpenBSD Innovations|url=https://www.openbsd.org/innovations.html|publisher=The OpenBSD project|accessdate=12 September 2016}}</ref>
* Basic sysctl [[hw.sensors]] API introduced for [[hardware monitoring]].<ref name=sensors-abc2009/>

|-
| {{Version |o |3.5}}
| 1 May 2004
|
|
''CARP License'' and ''Redundancy must be free'',<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/35.html|accessdate=9 October 2018}}</ref> where a fish seeking to license his free redundancy protocol, CARP, finds trouble with the red tape. A parody of the [[Fish License]] skit and [[Eric the Half-a-Bee Song]] by [[Monty Python]], with an anti-software patents message.
* [[Common Address Redundancy Protocol|CARP]], an open alternative to the [[Hot Standby Router Protocol|HSRP]] and [[Virtual Router Redundancy Protocol|VRRP]] redundancy systems available from commercial vendors.<ref name=onlamp-35-1>{{cite web
|url= http://web.archive.org/web/20040508140530/http://www.onlamp.com/lpt/a/4767
|title= OpenBSD PF Developer Interview
|author= Federico Biancuzzi
|website= [[ONLamp]] |publisher= [[O'Reilly Media]]
|date= 2004-04-15 |accessdate=2019-03-20
}}</ref><ref name=onlamp-35-2>{{cite web
|url= http://web.archive.org/web/20040619005622/http://www.onlamp.com/lpt/a/4839
|title= OpenBSD PF Developer Interview, Part 2
|author= Federico Biancuzzi
|website= [[ONLamp]] |publisher= [[O'Reilly Media]]
|date= 2004-05-06 |accessdate=2019-03-20
}}</ref>
* GPL licensed parts of the GNU tool-set, [[Bc programming language|bc]] <ref>{{cite web|title=bc(1)|url=https://man.openbsd.org/bc.1|accessdate=9 October 2018}}</ref>, [[Dc (Unix)|dc]] <ref>{{cite web|title=dc(1)|url=https://man.openbsd.org/OpenBSD-5.9/man1/dc.1|accessdate=9 October 2018}}</ref>, [[Nm (Unix)|nm]] <ref>{{cite web|title=nm(1)|url=https://man.openbsd.org/nm.1|accessdate=9 October 2018}}</ref> and [[Size (Unix)|size]] <ref>{{cite web|title=size(1)|url=https://man.openbsd.org/size.1|accessdate=9 October 2018}}</ref>, were all replaced with BSD licensed equivalents.
* [[AMD64]] platform becomes stable enough for release and is included for the first time as part of a release.

|-
| {{Version |o |3.6}}
| 1 November 2004
|
|
''Pond-erosa Puff (live)'' was the tale of ''Pond-erosa Puff'',<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/36.html|accessdate=9 October 2018}}</ref> a no-guff freedom fighter from the wild west, set to hang a lickin' on no-good bureaucratic nerds who encumber software with needless words and restrictions. The song was styled after the works of [[Johnny Cash]], a parody of the [[Spaghetti Western]] and [[Clint Eastwood]] and inspired by liberal license enforcement.
* [[OpenNTPD]], a compatible alternative to the reference NTP daemon, was developed within the OpenBSD project. The goal of OpenNTPD was not solely a compatible license. It also aims to be a simple, secure NTP implementation providing acceptable accuracy for most cases, without requiring detailed configuration.<ref>{{cite web|title=Release Notes|url=https://www.openntpd.org/goals.html|accessdate=9 October 2018}}</ref><ref name=onlamp-36/>
* Because of its questionable security record and doubts of developers for better future development, OpenBSD removed [[Wireshark|Ethereal]] from its ports tree prior to its 3.6 release.
* Added support for [[I²C]] master/slave devices<ref name=onlamp-36>{{cite web
|url= http://web.archive.org/web/20041029232336/http://www.onlamp.com/lpt/a/5302
|title= OpenBSD 3.6 Live
|author= Federico Biancuzzi
|website= [[ONLamp]] |publisher= [[O'Reilly Media]]
|date= 2004-10-28 |accessdate=2019-03-20
}}</ref>

|-
| {{Version |o |3.7}}
| 19 May 2005
|
| ''[[Wizard of OS (song)|The Wizard of OS]]'',<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/37.html|accessdate=9 October 2018}}</ref> where ''Puffathy'', a little [[Alberta]] girl, must work with [[Taiwan]] to save the day by getting unencumbered [[wireless]]. This release was styled after the works of [[Pink Floyd]] and a parody of The [[The Wizard of Oz (1939 film)|Wizard of Oz]]; this dealt with wireless hacking.<ref name=onlamp-37>{{cite web
|url= http://web.archive.org/web/20050521234307/http://www.onlamp.com/pub/a/bsd/2005/05/19/openbsd_3_7.html
|title= OpenBSD 3.7: The Wizard of OS
|author= Federico Biancuzzi
|website= [[ONLamp]] |publisher= [[O'Reilly Media]]
|date= 2005-05-19 |accessdate=2019-03-20
}}</ref>

|-
| {{Version |o |3.8}}
| 1 November 2005
| 1 November 2006
| ''Hackers of the Lost RAID'',<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/38.html|accessdate=9 October 2018}}</ref> which detailed the exploits of ''Puffiana Jones'', famed hackologist and adventurer, seeking out the Lost RAID, Styled after the radio [[Serial (radio and television)|serials]] of the 1930s and 40s, this was a [[parody]] of [[Indiana Jones]] and was linked to the new RAID tools featured as part of this release. This is the first version released without the [[telnet]] daemon which was completely removed from the source tree by Theo de Raadt in May 2005.<ref>{{cite web |url=http://marc.info/?l=openbsd-cvs&m=111700017509177&w=2 |quote=Removed files: libexec/telnetd |title=CVS: cvs.openbsd.org: src |first1=Theo |last1=de Raadt |author-link1= Theo de Raadt |website=OpenBSD-CVS mailing list}}</ref>
* bioctl introduced as a new universal RAID management tool (similar to [[ifconfig]])<ref name=onlamp-38>{{cite web
|url= http://web.archive.org/web/20051227050708/http://www.onlamp.com/lpt/a/6270
|title= OpenBSD 3.8: Hackers of the Lost RAID
|author= Federico Biancuzzi
|website= [[ONLamp]] |publisher= [[O'Reilly Media]]
|date= 2005-10-20 |accessdate=2019-03-20
}}</ref>
|-
| {{Version |o |3.9}}
| 1 May 2006
| 1 May 2007
|
''Attack of the Binary BLOB'',<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/39.html|accessdate=9 October 2018}}</ref> which chronicles the developer's fight against [[binary blobs]] and [[vendor lock-in]],<ref name=onlamp-39/> a parody of the 1958 film [[The Blob]] and the pop-rock music of the era.
* Enhanced [[OpenBGPD]] feature-set.
* Improved [[hw.sensors|hardware sensors]] support, including a new [[Intelligent Platform Management Interface|IPMI]] subsystem and a new [[I²C]] scan subsystem; number of drivers using the sensors framework increased to a total of 33 drivers (compared to 9 in the prior 3.8 release 6 months ago).<ref name=sensors-abc2009/><ref name=onlamp-39>{{cite web
|url= http://web.archive.org/web/20060512051701/http://www.onlamp.com/lpt/a/6557
|title= OpenBSD 3.9: Blob-Busters Interviewed
|author= Federico Biancuzzi
|website= [[ONLamp]] |publisher= [[O'Reilly Media]]
|date= 2006-04-27 |accessdate=2019-03-19
}}</ref>

|-
| {{Version |o |4.0}}
| 1 November 2006
| 1 November 2007
| ''Humppa Negala'',<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/40.html|accessdate=9 October 2018}}</ref> a [[Hava Nagilah]] parody with a portion of [[Entrance of the Gladiators]] and [[Humppa]] music fused together, with no story behind it, simply a [[Homage (arts)|homage]] to one of the OpenBSD developers' favorite genres of music.<ref name=onlamp-40>{{cite web
|url= http://web.archive.org/web/20070310145538/http://www.oreillynet.com/lpt/a/6769
|title= OpenBSD 4.0: Pufferix's Adventures
|author= Federico Biancuzzi
|website= [[ONLamp]] |publisher= [[O'Reilly Media]]
|date= 2006-10-26 |accessdate=2019-03-19
}}</ref>
* Second official remote security hole - buffer overflow by malformed [[ICMPv6]] packets <ref>{{cite web|title=Errata|url=https://www.openbsd.org/errata40.html#m_dup1errata40&nbsp;010|accessdate=9 October 2018}}</ref>

|-
| {{Version |o |4.1}}
| 1 May 2007
| 1 May 2008
| ''Puffy Baba and the 40 Vendors'',<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/41.html|accessdate=9 October 2018}}</ref> a parody of the [[Arabic]] [[fable]] [[Ali Baba]] and the Forty Thieves, part of the book of [[One Thousand and One Nights]], in which [[Linux]] developers are mocked over their allowance of [[non-disclosure agreement]]s when developing software while at the same time implying hardware vendors are [[criminals]] for not releasing documentation required to make reliable device drivers.<ref name=onlamp-41>{{cite web
|url= http://web.archive.org/web/20080518094717/http://www.onlamp.com/lpt/a/7008
|title= OpenBSD 4.1: Puffy Strikes Again
|author= Federico Biancuzzi
|website= [[ONLamp]] |publisher= [[O'Reilly Media]]
|date= 2007-05-03 |accessdate=2019-03-19
}}</ref>
* Redesigned sysctl [[hw.sensors]] into a two-level sensor API;<ref name=sensors-undeadly06>{{Cite web
|author= Constantine A. Murenin
|editor = Marco Peereboom
|date= 2006-12-30
|url= http://undeadly.org/cgi?action=article&sid=20061230235005
|title= New two-level sensor API
|website = [[OpenBSD Journal]]
|accessdate= 2019-03-04
}}</ref><ref name=sensors-ieee07>{{Cite conference
|author= Constantine A. Murenin |date= 2007-04-17
|url = http://sensors.cnst.su/IEEE_ICNSC_2007
|section = 4.3. What we have proposed and implemented
|title= Generalised Interfacing with Microprocessor System Hardware Monitors
|conference= Proceedings of 2007 IEEE International Conference on Networking, Sensing and Control, 15–17 April 2007.
|location= London, United Kingdom
|publisher=[[Institute of Electrical and Electronics Engineers|IEEE]]
|pages = 901-906 |doi = 10.1109/ICNSC.2007.372901 |isbn = 1-4244-1076-2
|id = IEEE ICNSC 2007, pp. 901—906.
}}</ref> a total of 46 device drivers exporting sensors through the framework with this release.<ref name=sensors-abc2009>{{Cite conference
|author1= Constantine A. Murenin
|author2= Raouf Boutaba
|author2-link = Raouf Boutaba
|date= 2009-03-17
|url= http://www.openbsd.org/papers/asiabsdcon2009-sensors-paper.pdf
|section= 6. Evolution of the framework
|title= OpenBSD Hardware Sensors Framework.
|conference= AsiaBSDCon 2009 Proceedings, 12–15 March 2009
|location= Tokyo University of Science, Tokyo, Japan
|publication-date= 2009-03-14
|archive-url= https://2009.asiabsdcon.org/papers/abc2009-P3B-paper.pdf
|archive-date= 2009-02-21
|dead-url= no
|accessdate= 2019-03-04
}}</ref>

|-
| {{Version |o |4.2}}
| 1 November 2007
| 1 November 2008
| ''100001 1010101'',<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/42.html|accessdate=9 October 2018}}</ref> the Linux kernel developers gets a knock for violating the ISC-style license of OpenBSD's open hardware abstraction layer for Atheros wireless cards.
* Usability of sensorsd improved, allowing zero-configuration monitoring of smart sensors from the [[hw.sensors]] framework, and easier configuration for monitoring of non-smart sensors.<ref name=onlamp-42>{{cite web
|layurl = http://undeadly.org/cgi?action=article&sid=20071102080000
|url= http://web.archive.org/web/20111013021755/http://onlamp.com/lpt/a/7155
|title= Puffy's Marathon: What's New in OpenBSD 4.2
|author= Federico Biancuzzi
|website= [[ONLamp]] |publisher= [[O'Reilly Media]]
|date= 2007-11-01 |accessdate=2019-03-03
}}</ref>

|-
| {{Version |o |4.3}}
| 1 May 2008
| 1 May 2009
| ''Home to Hypocrisy''<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/43.html|accessdate=9 October 2018}}</ref><ref name=onlamp-43>{{cite web
|url= http://web.archive.org/web/20080506054059/http://www.onlamp.com/lpt/a/7290
|title= Puffy and the Cryptonauts: What's New in OpenBSD 4.3
|author= Federico Biancuzzi
|website= [[ONLamp]] |publisher= [[O'Reilly Media]]
|date= 2008-04-29 |accessdate=2019-03-20
}}</ref>

|-
| {{Version |o |4.4}}
| 1 November 2008
| 18 October 2009
|
''Trial of the BSD Knights'',<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/44.html|accessdate=9 October 2018}}</ref> summarizes the history of [[Berkeley Software Distribution|BSD]] including the [[USL v. BSDi]] lawsuit. The song was styled after the works of [[Star Wars]].
* sparc64 port now supports many recent processors: [[Sun Microsystems|Sun]] [[UltraSPARC IV]], [[UltraSPARC T1|T1]], and [[UltraSPARC T2|T2]]; [[Fujitsu]] [[SPARC64 V]], [[SPARC64 VI|VI]], and [[SPARC64 VII|VII]].
* New System-on-a-Chip PowerPC port for Freescale devices
* [[C_dynamic_memory_allocation#OpenBSD.27s_malloc|malloc(3)]] [[Address_space_layout_randomization#OpenBSD|randomization]], guard pages, and randomized (delayed) free<ref name="OpenBSD-PIE">{{cite web|url=https://www.openbsd.org/papers/nycbsdcon08-pie/|title=OpenBSD's Position Independent Executable (PIE) Implementation|author=Kurt Miller|year=2008|accessdate=22 July 2011| archiveurl= https://web.archive.org/web/20110612150147/http://openbsd.org/papers/nycbsdcon08-pie/| archivedate= 12 June 2011 | deadurl= no}}</ref><ref name="OpenBSD_Innovations-ASLR-PIE"/><ref name=onlamp-44/>
* The [[hw.sensors]] framework is used by 68 device drivers, after 7 new drivers were added as of this release.<ref name=onlamp-44>{{cite web
|url= http://web.archive.org/web/20120524040127/http://broadcast.oreilly.com/2008/11/source-wars---return-of-the-pu.html
|title= Source Wars - Return of the Puffy: What's New in OpenBSD 4.4
|author= Federico Biancuzzi
|publisher= [[O'Reilly Media]]
|date= 2008-11-03 |accessdate=2019-03-03
}}</ref>

|-
| {{Version |o |4.5}}
| 1 May 2009
| 19 May 2010
| ''Games''. It was styled after the works of [[Tron]].<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/45.html|accessdate=9 October 2018}}</ref>
* The [[hw.sensors]] framework is used by 72 device drivers.<ref name=onlamp-45>{{cite web
|url= http://web.archive.org/web/20090619235238/http://broadcast.oreilly.com/2009/06/openbsd-45.html
|title= PuffyTron recommends OpenBSD 4.5
|author= Federico Biancuzzi
|publisher= [[O'Reilly Media]]
|date= 2009-06-15 |accessdate=2019-03-19
}}</ref><ref name=sensors-mmath/>

|-
| {{Version |o |4.6}}
| 18 October 2009
| 1 November 2010
| ''Planet of the Users''.<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/46.html|accessdate=9 October 2018}}</ref> In the style of ''[[Planet of the Apes]]'', Puffy travels in time to find a dumbed-down [[dystopia]], where "[[Bill Gates|one very rich man]] runs the earth with [[Microsoft|one multinational]]". Open-source software has since been replaced by one-button computers, one-channel televisions, and closed-source software which, after you purchase it, becomes obsolete before you have a chance to use it. People subsist on [[soylent green]]. The theme song is performed in the [[reggae rock]] style of [[The Police]].
* <code>smtpd(8)</code>, privilege-separated SMTP server
* <code>tmux(1)</code> terminal multiplexer
* The [[hw.sensors]] framework is used by 75 device drivers.<ref name=sensors-mmath>{{cite thesis
|degree= [[Master of Mathematics#Canada|MMath]]
|author= Constantine A. Murenin |date= 2010-05-21
|section = 6.2. Evolution of drivers; Chart VII. Number of drivers using the sensors framework from OpenBSD 3.4 to 4.6.
|title= OpenBSD Hardware Sensors — Environmental Monitoring and Fan Control.
|location= [[University of Waterloo]] |publisher= UWSpace
|url = http://cnst.su/MMathCS |hdl = 10012/5234
|id = Document ID: ab71498b6b1a60ff817b29d56997a418.
}}</ref>

|-
| {{Version |o |4.7}}
| 19 May 2010
| 1 May 2011
| ''I'm Still Here'' <ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/47.html|accessdate=9 October 2018}}</ref>

|-
| {{Version |o |4.8}}
| 1 November 2010
| 1 November 2011
| ''El Puffiachi''. <ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/48.html|accessdate=9 October 2018}}</ref><ref>{{cite web|title=MARC|url=http://marc.info/?l=openbsd-misc&m=128397592926217&w=2|accessdate=9 October 2018}}</ref>
* <code>iked(8)</code> [[IKEv2]] daemon
* <code>ldapd(8)</code> LDAP daemon

|-
| {{Version |o |4.9}}
| 1 May 2011
| 1 May 2012
| ''The Answer''. <ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/49.html|accessdate=9 October 2018}}</ref>
* <code>rc.d(8)</code> daemon control

|-
| {{Version |o |5.0}}
| 1 November 2011
| 1 November 2012
| ''What Me Worry?''. <ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/50.html|accessdate=9 October 2018}}</ref>

|-
| {{Version |o |5.1}}
| 1 May 2012
| 1 May 2014
| ''Bug Busters''. The song was styled after the works of [[Ghostbusters]]. <ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/51.html|accessdate=9 October 2018}}</ref>

|-
| {{Version |o |5.2}}
| 1 November 2012
| 1 November 2013
| ''Aquarela do Linux''. <ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/52.html|accessdate=9 October 2018}}</ref>
* [[Nginx|<code>nginx(8)</code>]] HTTP server
* SSLv2 disabled

|-
| {{Version |o |5.3}}
| 1 May 2013
| 1 May 2014
| ''Blade Swimmer''. The song was styled after the works of [[Roy Lee]], a parody of [[Blade Runner]]. <ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/53.html|accessdate=9 October 2018}}</ref>
* [[Position-independent_code#PIE|Position-independent executables]] (PIE) by default for seven hardware platforms<ref name="OpenBSD_Innovations-ASLR-PIE"/>

|-
| {{Version |o |5.4}}
| 1 November 2013
| 1 November 2014
| ''Our favorite hacks''. <ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/54.html|accessdate=9 October 2018}}</ref>

|-
| {{Version |o |5.5}}
| 1 May 2014
| 1 May 2015
| ''Wrap in Time''.<ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/55.html|accessdate=9 October 2018}}</ref>
* <code>signify(1)</code> cryptographic signatures of release and packages
* 64bit <code>time_t</code> on all platforms ([[Year 2038 problem|Y2K38]] ready)

|-
| {{Version |o |5.6}}
| 1 November 2014
| 18 October 2015
| ''Ride of the Valkyries''. <ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/56.html|accessdate=9 October 2018}}</ref>
* [[LibreSSL]] fork of [[OpenSSL]]
* [[Apache HTTP Server|Apache HTTPD]] removed from base

|-
| {{Version |o |5.7}}
| 1 May 2015
| 29 March 2016
| ''Source Fish''. <ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/57.html|accessdate=9 October 2018}}</ref>
* <code>rcctl(8)</code> utility to control daemons
* <code>nginx(8)</code> removed from base
* [[procfs]] has been removed
|-
| {{Version |o |5.8}}
| 18 October 2015
| 1 September 2016
| ''20 years ago today'', ''Fanza'', ''So much better'', ''A Year in the Life''. <ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/58.html|accessdate=9 October 2018}}</ref><br>
(20th anniversary release<ref>{{cite web|title=MARC|url=http://marc.info/?l=openbsd-announce&m=144515087006176|accessdate=9 October 2018}}</ref>)
* <code>doas(1)</code> replacement of [[sudo]]

|-
| {{Version |o |5.9}}
| 29 March 2016
| 11 April 2017
| ''Doctor W^X'', ''Systemagic (Anniversary Edition)''. <ref>{{cite web|title=Release Notes|url=https://www.openbsd.org/59.html|accessdate=9 October 2018}}</ref>
* [[W^X]] enforced in i386 kernel
* <code>pledge(2)</code> process restriction

|-
| {{Version |o |6.0}}
| 1 September 2016
| 9 October 2017
| ''Another Smash of the Stack'', ''Black Hat'', ''Money'', ''Comfortably Dumb (the misc song)'', ''Mother'', ''Goodbye'' and ''Wish you were Secure'', Release songs parodies Pink Floyd's [[The Wall]] and [[Wish You Were Here (Pink Floyd song)|Wish You Were Here]]<ref>{{cite book|title=OpenBSD 6.0|url=https://www.openbsd.org/60.html|website=OpenBSD|accessdate=24 July 2016|isbn=978-0-9881561-8-0}}</ref>
* <code>vmm(4)</code> virtualization (disabled by default)
* Removed vax<ref>{{cite web|title=OpenBSD vax|url=https://www.openbsd.org/vax.html|website=OpenBSD|accessdate=2 September 2016}}</ref> and 32-bit SPARC<ref>{{cite web|title=OpenBSD sparc|url=https://www.openbsd.org/sparc.html|website=OpenBSD|accessdate=2 September 2016}}</ref> support
|-
| {{Version |o |6.1}}
| 11 April 2017
| 15 April 2018
| ''Winter of 95''<ref>{{cite web|title=OpenBSD 6.1|url=https://www.openbsd.org/61.html|website=OpenBSD|accessdate=11 April 2017}}</ref>
* <code>syspatch(8)</code> utility for binary base system updates
* new <code>arm64</code> platform
|-
| {{Version |o |6.2}}
| 9 October 2017
| 18 October 2018
| {{fact|date=October 2018}}
* <code>inteldrm(4)</code> Skylake/Kaby Lake/Cherryview devices
* <code>clang(1)</code> base system compiler on <code>i386</code> and <code>amd64</code> platforms
|-
| {{Version |co |6.3}}
| 2 April 2018
|
|
* SMP is supported on <code>arm64</code> platforms.
* Several parts of the network stack now run without KERNEL_LOCK().
* Multiple security improvements have been made, including Meltdown/Spectre (variant 2) mitigations. Intel CPU microcode is loaded on boot on <code>amd64</code>.
* pledge() has been modified to support "execpromises" (as the second argument).
|-
| {{Version |c |6.4}}
| 18 October 2018
|
|
* <code>unveil(2)</code> filesystem visibility restriction. <ref>{{cite web|title=unveil(2)|url=https://man.openbsd.org/unveil|website=OpenBSD|accessdate=19 October 2018}}</ref>
|-

! Version
! Release date
! Supported until
! Significant changes
|}

== Notes ==
{{notelist}}

== References ==
{{reflist}}

==External links==
* {{Official website}}

{{OpenBSD}}

[[Category:OpenBSD]]
[[Category:History of free and open-source software|OpenBSD]]
[[Category:Software version histories]]

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