CVE-2009-4131

Severity: high (CVSS 7.2 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-12-13 · updated 2026-06-16
Weakness: CWE-264

Description

The EXT4_IOC_MOVE_EXT (aka move extents) ioctl implementation in the ext4 filesystem in the Linux kernel before 2.6.32-git6 allows local users to overwrite arbitrary files via a crafted request, related to insufficient checks for file permissions.

Affected products

Linux kernel: through 2.6.32; 2.6.0, 2.6.1, 2.6.2, 2.6.3, 2.6.4, 2.6.5 (+332)

References

http://git.kernel.org/?p=linux/kernel/git/tytso/ext4.git%3Ba=commit%3Bh=4a58579b9e4e2a35d57e6c9c8483e52f6f1b7fd6
http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html
http://lkml.org/lkml/2009/12/9/255
http://secunia.com/advisories/37658
http://secunia.com/advisories/37686
http://secunia.com/advisories/38017
http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.32-git6.log
http://www.mandriva.com/security/advisories?name=MDVSA-2009:329
http://www.securityfocus.com/bid/37277
http://www.theregister.co.uk/2009/12/11/linux_kernel_bugs_patched/
http://www.ubuntu.com/usn/USN-869-1
http://www.vupen.com/english/advisories/2009/3468

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