CVE-2009-2406

Severity: medium (CVSS 6.9 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-07-31 · updated 2026-06-16
Weakness: CWE-119

Description

Stack-based buffer overflow in the parse_tag_11_packet function in fs/ecryptfs/keystore.c in the eCryptfs subsystem in the Linux kernel before 2.6.30.4 allows local users to cause a denial of service (system crash) or possibly gain privileges via vectors involving a crafted eCryptfs file, related to not ensuring that the key signature length in a Tag 11 packet is compatible with the key signature buffer size.

Affected products

Linux Kernel: 2.6.24.7, 2.6.25.15
Linux kernel: through 2.6.30.3; 2.2.6, 2.6, 2.6.0, 2.6.0-test1, 2.6.0-test10, 2.6.0-test11 (+385)

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=6352a29305373ae6196491e6d4669f301e26492e
http://lists.opensuse.org/opensuse-security-announce/2009-09/msg00001.html
http://risesecurity.org/advisories/RISE-2009002.txt
http://secunia.com/advisories/35985
http://secunia.com/advisories/36045
http://secunia.com/advisories/36051
http://secunia.com/advisories/36054
http://secunia.com/advisories/36116
http://secunia.com/advisories/36131
http://secunia.com/advisories/37471
http://www.debian.org/security/2009/dsa-1844
http://www.debian.org/security/2009/dsa-1845

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