CVE-2010-2066

Severity: medium (CVSS 5.5 v3.1)
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: 2010-09-08 · updated 2026-06-16

Description

The mext_check_arguments function in fs/ext4/move_extent.c in the Linux kernel before 2.6.35 allows local users to overwrite an append-only file via a MOVE_EXT ioctl call that specifies this file as a donor.

Affected products

Canonical Ubuntu Linux: 6.06, 8.04, 9.04, 9.10, 10.04, 10.10
Linux kernel: before 2.6.35 — fixed in 2.6.35
SUSE Linux Enterprise High Availability Extension: 11-sp1
Suse Linux Enterprise Desktop: 11-sp1
SUSE Linux Enterprise: 11-sp1
VMware ESX: 4.0, 4.1

How to fix

Upgrade to a fixed version: Linux kernel 2.6.35. Check the vendor advisory for mitigations.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1f5a81e41f8b1a782c68d3843e9ec1bfaadf7d72
http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00000.html
http://secunia.com/advisories/43315
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35
http://www.openwall.com/lists/oss-security/2010/06/07/1
http://www.openwall.com/lists/oss-security/2010/06/09/1
http://www.redhat.com/support/errata/RHSA-2010-0610.html
http://www.securityfocus.com/archive/1/516397/100/0/threaded
http://www.ubuntu.com/usn/USN-1000-1
http://www.vmware.com/security/advisories/VMSA-2011-0003.html
https://bugzilla.redhat.com/show_bug.cgi?id=601006
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1f5a81e41f8b1a782c68d3843e9ec1bfaadf7d72

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