The tables below list the major and minor Red Hat Enterprise Linux updates, their release dates, and the kernel versions that shipped with them.

Red Hat does not generally disclose future release schedules.
Refer to the Red Hat Enterprise Linux Life Cycle Policy for details on the life cycle of Red Hat Enterprise Linux releases.

To find your Red Hat Enterprise Linux release please:

cat /etc/redhat-release

To find your kernel version please:

uname -a

Red Hat Enterprise Linux 7

Release	General Availability Date	redhat-release Errata Date*	Kernel Version
RHEL 7.2	2015-11-19	2015-11-19 RHEA-2015:2461	3.10.0-327
RHEL 7.1	2015-03-05	2015-03-05 RHEA-2015:0524	3.10.0-229
RHEL 7.0 GA	2014-06-09	-	3.10.0-123
RHEL 7.0 Beta	2013-12-11	-	3.10.0-54.0.1

Codename: Maipo (based on a mix of Fedora 19, Fedora 20, and several modifications)

Red Hat Enterprise Linux 6

Release	General Availability Date	redhat-release Errata Date*	Kernel Version
RHEL 6.8	TBA	TBA	TBA
RHEL 6.7	2015-07-22	2015-07-22 RHEA-2015:1423	2.6.32-573
RHEL 6.6	2014-10-14	2014-10-13 RHEA-2014:1608	2.6.32-504
RHEL 6.5	2013-11-21	2013-11-20 RHSA-2013:1645-2	2.6.32-431
RHEL 6.4	2013-02-21	2013-02-21 RHSA-2013-0496	2.6.32-358
RHEL 6.3	2012-06-20	2012-06-19 RHSA-2012-0862	2.6.32-279
RHEL 6.2	2011-12-06	2011-12-06 RHEA-2011:1743	2.6.32-220
RHEL 6.1	2011-05-19	2011-05-19 RHEA-2011:0540	2.6.32-131.0.15
RHEL 6.0	2010-11-09	-	2.6.32-71

Codename: Santiago (based on a mix of Fedora 12, Fedora 13, and several modifications)

Red Hat Enterprise Linux 5

Release	General Availability Date	redhat-release Errata Date*	Kernel Version
RHEL 5.11	2014-09-16	2014-09-16 RHEA-2014-1238	2.6.18-398
RHEL 5.10	2013-10-01	2013-09-30 RHEA-2013-1311	2.6.18-371
RHEL 5.9	2013-01-07	2013-01-07 RHEA-2013-0021	2.6.18-348
RHEL 5.8	2012-02-20	2012-02-20 RHEA-2012:0315	2.6.18-308
RHEL 5.7	2011-07-21	2011-07-20 RHEA-2011:0977	2.6.18-274
RHEL 5.6	2011-01-13	2011-01-12 RHEA-2011:0020	2.6.18-238
RHEL 5.5	2010-03-30	2010-03-30 RHEA-2010:0207	2.6.18-194
RHEL 5.4	2009-09-02	2009-09-02 RHEA-2009:1400	2.6.18-164
RHEL 5.3	2009-01-20	2009-01-20 RHEA-2009:0133	2.6.18-128
RHEL 5.2	2008-05-21	2008-05-20 RHEA-2008:0436	2.6.18-92
RHEL 5. 1	2007-11-07	2007-11-07 RHEA-2007:0854	2.6.18-53
RHEL 5.0	2007-03-15	-	2.6.18-8

Codename: Tikanga (based on Fedora Core 6)

Red Hat Enterprise Linux 4

Release/Update	General Availability Date	redhat-release Errata Date*	Kernel Version
RHEL 4 Update 9	2011-02-16	2011-02-16 RHEA-2011:0251	2.6.9-100
RHEL 4 Update 8	2009-05-19	2009-05-18 RHEA-2009:1002	2.6.9-89
RHEL 4 Update 7	2008-07-29	2008-07-24 RHEA-2008:0769	2.6.9-78
RHEL 4 Update 6	2007-11-15	2007-11-15 RHBA-2007:0897	2.6.9-67
RHEL 4 Update 5	2007-05-01	2007-04-27 RHBA-2007:0196	2.6.9-55
RHEL 4 Update 4	2006-08-10	2006-08-10 RHBA-2006:0601	2.6.9-42
RHEL 4 Update 3	2006-03-12	2006-03-07 RHBA-2006:0149	2.6.9-34
RHEL 4 Update 2	2005-10-05	2005-10-05 RHEA-2005:786	2.6.9-22
RHEL 4 Update 1	2005-06-08	2005-06-08 RHEA-2005:318	2.6.9-11
RHEL 4 GA	2005-02-15	-	2.6.9-5

Codename: Nahant (based on Fedora Core 3)

Red Hat Enterprise Linux 3

Release/Update	General Availability Date	Kernel Version
RHEL 3 Update 9	2007-06-20	2.4.21-50
RHEL 3 Update 8	2006-07-20	2.4.21-47
RHEL 3 Update 7	2006-03-17	2.4.21-40
RHEL 3 Update 6	2005-09-28	2.4.21-37
RHEL 3 Update 5	2005-05-18	2.4.21-32
RHEL 3 Update 4	2004-12-12	2.4.21-27
RHEL 3 Update 3	2004-09-03	2.4.21-20
RHEL 3 Update 2	2004-05-12	2.4.21-15
RHEL 3 Update 1	2004-01-16	2.4.21-9
RHEL 3 GA	2003-10-22	2.4.21-4

Codename: Taroon (based on Red Hat Linux 9)

Red Hat Enterprise Linux 2.1