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CVE-2010-4248

Published: 30 November 2010

Race condition in the __exit_signal function in kernel/exit.c in the Linux kernel before 2.6.37-rc2 allows local users to cause a denial of service via vectors related to multithreaded exec, the use of a thread group leader in kernel/posix-cpu-timers.c, and the selection of a new thread group leader in the de_thread function in fs/exec.c.

From the Ubuntu Security Team

It was discovered that multithreaded exec did not handle CPU timers correctly. A local attacker could exploit this to crash the system, leading to a denial of service.

Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy
Released (2.6.24-28.86)
karmic
Released (2.6.31-22.73)
lucid
Released (2.6.32-29.57)
maverick
Released (2.6.35-27.47)
natty
Released (2.6.37-5.13)
upstream
Released (2.6.37~rc2)
Patches:
upstream: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e0a70217107e6f9844628120412cb27bb4cea194
hardy: http://chinstrap.ubuntu.com/~bradf/CVEs/CVE-2010-4248/patches/hardy/linux/0001-posix-cpu-timers-workaround-to-suppress-the-problems-w.txt
karmic: http://chinstrap.ubuntu.com/~bradf/CVEs/CVE-2010-4248/patches/karmic/linux/0001-posix-cpu-timers-workaround-to-suppress-the-problems-w.txt
lucid: http://chinstrap.ubuntu.com/~bradf/CVEs/CVE-2010-4248/patches/lucid/linux/0001-posix-cpu-timers-workaround-to-suppress-the-problems-w.txt
linux-ec2
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic
Released (2.6.31-307.27)
lucid
Released (2.6.32-313.25)
maverick Ignored
(binary supplied by "linux" now)
natty Does not exist

upstream
Released (2.6.37~rc2)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic
Released (2.6.31-112.30)
lucid
Released (2.6.31-609.26)
maverick Does not exist

natty Does not exist

upstream
Released (2.6.37~rc2)
linux-lts-backport-maverick
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic Does not exist

lucid
Released (2.6.35-28.50~lucid1)
maverick Does not exist

natty Does not exist

upstream
Released (2.6.37~rc2)
linux-lts-backport-natty
Launchpad, Ubuntu, Debian
hardy Does not exist

lucid Not vulnerable
(2.6.38-1.27~lucid1)
maverick Does not exist

natty Does not exist

upstream
Released (2.6.37~rc2)
linux-mvl-dove
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic Ignored
(abandonded branch)
lucid
Released (2.6.32-214.30)
maverick
Released (2.6.32-414.30)
natty Does not exist

upstream
Released (2.6.37~rc2)
linux-source-2.6.15
Launchpad, Ubuntu, Debian
dapper Not vulnerable

hardy Does not exist

karmic Does not exist

lucid Does not exist

maverick Does not exist

natty Does not exist

upstream
Released (2.6.37~rc2)
linux-ti-omap4
Launchpad, Ubuntu, Debian
dapper Does not exist

hardy Does not exist

karmic Does not exist

lucid Does not exist

maverick
Released (2.6.35-903.23)
natty Not vulnerable
(2.6.38-1201.2)
upstream
Released (2.6.37~rc2)