The current 2.6 development kernel is 2.6.26-rc5, released on June 4. As is usual
at this point in the release cycle, it is mostly bug fixes and the
like. There are a fair number of changes in the core kernel code, mostly
for scheduler issues, including some reverts for some performance
regressions. "Another week, another batch of mostly pretty small
fixes. Hopefully the regression list is shrinking, and we've fixed at least
a couple of the oopses on Arjan's list." See the long-format
all the details. A 2.6.26-rc6 release is probably coming soon.
The current -mm tree is 2.6.26-rc5-mm2 which is a bug
fix for 2.6.26-rc5-mm1, also
released this week. The main additions are the unprivileged mounts tree
and a "large number of deep changes to memory management."
The current stable 2.6 kernel is 22.214.171.124, released on June 9. It has a whole
pile of bugfixes, with none that are specifically called out as security
related. "It contains a number of assorted bugfixes all over the
tree. Users are encouraged to update." See the LWN announcement for some
discussion about potential security issues with this release. Also, note
that 126.96.36.199 was released on
June 7 with "one security bug fix. If you are using CIFS or SNMP NAT
you could be vulnerable and are encouraged to upgrade."
For older kernels: 188.8.131.52 was released on June
6. "It only fixes a vulnerability in the netfilter ip_nat_snmp_basic
(CVE-2008-1673). If you don't use it, you don't need to upgrade."
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