CVE-2012-0038 — Integer overflow in the xfs_acl_from_disk function in fs/xfs/xfs_acl

Integer overflow in the xfs_acl_from_disk function in fs/xfs/xfs_acl.c in the Linux kernel before 3.1.9 allows local users to cause a denial of service (panic) via a filesystem with a malformed ACL, leading to a heap-based buffer overflow.

01What is this vulnerability?

Integer overflow in the xfs_acl_from_disk function in fs/xfs/xfs_acl.c in the Linux kernel before 3.1.9 allows local users to cause a denial of service (panic) via a filesystem with a malformed ACL, leading to a heap-based buffer overflow.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2012-05-17T10:00:00.000Z
• Last modified: 2024-08-06T18:09:17.250Z

09References

• www.openwall.com — http://www.openwall.com/lists/oss-security/2012/01/10/11
• github.com — https://github.com/torvalds/linux/commit/fa8b18edd752a8b4e9d1ee2cd615b82c93cf8bb…
• git.kernel.org — http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=…
• git.kernel.org — http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=…
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=773280
• github.com — https://github.com/torvalds/linux/commit/093019cf1b18dd31b2c3b77acce4e000e2cbc9c…
• www.kernel.org — http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1.9