CVE-2011-4086

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: 2012-07-03 · updated 2026-06-16
Weakness: CWE-119

Description

The journal_unmap_buffer function in fs/jbd2/transaction.c in the Linux kernel before 3.3.1 does not properly handle the _Delay and _Unwritten buffer head states, which allows local users to cause a denial of service (system crash) by leveraging the presence of an ext4 filesystem that was mounted with a journal.

Affected products

Linux kernel: through 3.3; 3.0-rc1, 3.0-rc2, 3.0-rc3, 3.0-rc4, 3.0-rc5, 3.0-rc6 (+77)

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=15291164b22a357cb211b618adfef4fa82fc0de3
http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html
http://rhn.redhat.com/errata/RHSA-2012-0571.html
http://rhn.redhat.com/errata/RHSA-2012-0670.html
http://secunia.com/advisories/48898
http://secunia.com/advisories/48964
http://www.debian.org/security/2012/dsa-2469
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.1
https://bugzilla.redhat.com/show_bug.cgi?id=749143
https://github.com/torvalds/linux/commit/15291164b22a357cb211b618adfef4fa82fc0de3
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=15291164b22a357cb211b618adfef4fa82fc0de3

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