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

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)

References

Bugs

https://bugzilla.redhat.com/show_bug.cgi?id=656264

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