Description
The _xfs_buf_find function in fs/xfs/xfs_buf.c in the Linux kernel before 3.7.6 does not validate block numbers, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by leveraging the ability to mount an XFS filesystem containing a metadata inode with an invalid extent map.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 3.8-1 | — |
| Debian 13 | linux | 3.8-1 | — |
| Debian 12 | linux | 3.8-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +11 | 3.6.11.2-rt33.39.el6rt | RHSA-2013:0829 |
Advisories 1
- RHSA-2013:0829 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
References
- USN-1970-1 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=918009
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.7.6
- USN-1975-1 vendor-advisory
- SUSE-SU-2013:1473 vendor-advisory
- [oss-security] 20130305 Re: CVE request: Linux kernel: xfs: _xfs_buf_find NULL pointer dereference mailing-list
- openSUSE-SU-2013:1971 vendor-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=eb178619f930fa2ba2348de332a1ff1c66a31424
- USN-1968-1 vendor-advisory
- USN-1969-1 vendor-advisory
- SUSE-SU-2013:1474 vendor-advisory
- USN-1973-1 vendor-advisory
- https://github.com/torvalds/linux/commit/eb178619f930fa2ba2348de332a1ff1c66a31424
- USN-1972-1 vendor-advisory