CVE-2010-2537

Publication date 30 September 2010

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

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.

From the Ubuntu Security Team

Dan Rosenberg discovered that the btrfs filesystem did not correctly validate permissions when using the clone function. A local attacker could overwrite the contents of file handles that were opened for append-only, or potentially read arbitrary contents, leading to a loss of privacy.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
linux	10.10 maverick	Fixed 2.6.35-14.19
	10.04 LTS lucid	Fixed 2.6.32-25.43
	9.10 karmic	Fixed 2.6.31-22.70
	9.04 jaunty	Ignored end of life
	8.04 LTS hardy	Not affected
	6.06 LTS dapper	Not in release
linux-ec2	11.04 natty	Not in release
	10.10 maverick	Ignored end of life
	10.04 LTS lucid	Fixed 2.6.32-311.23
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not in release
linux-lts-backport-maverick	10.10 maverick	Not in release
	10.04 LTS lucid	Fixed 2.6.35-25.44~lucid1
	9.10 karmic	Not in release
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not in release
linux-source-2.6.15	10.10 maverick	Not in release
	10.04 LTS lucid	Not in release
	9.10 karmic	Not in release
	9.04 jaunty	Not in release
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not affected

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
linux	Upstream: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2ebc3464781ad24474abcbd2274e6254689853b5

Severity score breakdown

Parameter	Value
Base score	7.1 · High
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H