CVE-2012-5374

Severity: medium (CVSS 4.0 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: 2013-02-18 · updated 2026-06-16
Weakness: CWE-310

Description

The CRC32C feature in the Btrfs implementation in the Linux kernel before 3.8-rc1 allows local users to cause a denial of service (extended runtime of kernel code) by creating many different files whose names are associated with the same CRC32C hash value.

Affected products

Linux kernel: 3.0-rc1, 3.0-rc2, 3.0-rc3, 3.0-rc4, 3.0-rc5, 3.0-rc6 (+165)

References

http://crypto.junod.info/2012/12/13/hash-dos-and-btrfs/
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9c52057c698fb96f8f07e7a4bcf4801a092bda89
http://lists.opensuse.org/opensuse-security-announce/2013-03/msg00004.html
http://openwall.com/lists/oss-security/2012/12/13/20
http://www.kernel.org/pub/linux/kernel/v3.x/testing/patch-3.8-rc1.bz2
http://www.ubuntu.com/usn/USN-1944-1
http://www.ubuntu.com/usn/USN-1945-1
http://www.ubuntu.com/usn/USN-1946-1
http://www.ubuntu.com/usn/USN-1947-1
http://www.ubuntu.com/usn/USN-2017-1
https://github.com/torvalds/linux/commit/9c52057c698fb96f8f07e7a4bcf4801a092bda89
http://crypto.junod.info/2012/12/13/hash-dos-and-btrfs/

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