CVE-2010-0623

Severity: medium (CVSS 4.9 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2010-02-15 · updated 2026-06-16

Description

The futex_lock_pi function in kernel/futex.c in the Linux kernel before 2.6.33-rc7 does not properly manage a certain reference count, which allows local users to cause a denial of service (OOPS) via vectors involving an unmount of an ext3 filesystem.

Affected products

Canonical Ubuntu Linux: 6.06, 8.04, 8.10, 9.04, 9.10
Linux kernel: before 2.6.33; 2.6.33, 2.6.33-rc1, 2.6.33-rc2, 2.6.33-rc3, 2.6.33-rc4, 2.6.33-rc5 (+1) — fixed in 2.6.33
Opensuse: 11.2

How to fix

Upgrade to a fixed version: Linux kernel 2.6.33. Check the vendor advisory for mitigations.

References

http://bugzilla.kernel.org/show_bug.cgi?id=14256
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=5ecb01cfdf96c5f465192bdb2a4fd4a61a24c6cc
http://lists.opensuse.org/opensuse-security-announce/2010-03/msg00006.html
http://secunia.com/advisories/38922
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.33-rc7
http://www.mandriva.com/security/advisories?name=MDVSA-2010:088
http://www.openwall.com/lists/oss-security/2010/02/11/2
http://www.ubuntu.com/usn/USN-914-1
http://www.vupen.com/english/advisories/2010/0638
http://bugzilla.kernel.org/show_bug.cgi?id=14256
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=5ecb01cfdf96c5f465192bdb2a4fd4a61a24c6cc
http://lists.opensuse.org/opensuse-security-announce/2010-03/msg00006.html

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