CVE-2010-2537

Severity: high (CVSS 7.1 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: 2010-09-30 · updated 2026-06-16

Description

The btrfs_ioctl_clone function in fs/btrfs/ioctl.c in the Linux kernel before 2.6.35 allows local users to overwrite an append-only file via a (1) BTRFS_IOC_CLONE or (2) BTRFS_IOC_CLONE_RANGE ioctl call that specifies this file as a donor.

Affected products

Canonical Ubuntu Linux: 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

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=2ebc3464781ad24474abcbd2274e6254689853b5
http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.html
http://secunia.com/advisories/42758
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35
http://www.openwall.com/lists/oss-security/2010/07/21/10
http://www.openwall.com/lists/oss-security/2010/07/21/4
http://www.securityfocus.com/bid/41847
http://www.ubuntu.com/usn/USN-1041-1
http://www.vupen.com/english/advisories/2011/0070
https://bugzilla.redhat.com/show_bug.cgi?id=616998
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2ebc3464781ad24474abcbd2274e6254689853b5
http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.html

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