CVE-2011-1012

Severity: medium (CVSS 4.9 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: none known
Published: 2011-03-01 · updated 2026-06-16
Weakness: CWE-369

Description

The ldm_parse_vmdb function in fs/partitions/ldm.c in the Linux kernel before 2.6.38-rc6-git6 does not validate the VBLK size value in the VMDB structure in an LDM partition table, which allows local users to cause a denial of service (divide-by-zero error and OOPS) via a crafted partition table.

Affected products

Canonical Ubuntu Linux: 8.04
Linux kernel: before 2.6.38; 2.6.38, 2.6.38-rc1, 2.6.38-rc2, 2.6.38-rc3, 2.6.38-rc4, 2.6.38-rc5 — fixed in 2.6.38

How to fix

Upgrade to a fixed version: Linux kernel 2.6.38. Check the vendor advisory for mitigations.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=294f6cf48666825d23c9372ef37631232746e40d
http://openwall.com/lists/oss-security/2011/02/23/21
http://openwall.com/lists/oss-security/2011/02/23/4
http://securityreason.com/securityalert/8115
http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.38-rc6-git6.log
http://www.pre-cert.de/advisories/PRE-SA-2011-01.txt
http://www.securityfocus.com/archive/1/516615/100/0/threaded
http://www.securityfocus.com/bid/46512
http://www.securitytracker.com/id?1025127
http://www.spinics.net/lists/mm-commits/msg82429.html
http://www.ubuntu.com/usn/USN-1146-1
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=294f6cf48666825d23c9372ef37631232746e40d

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