CVE-2018-10323 — The xfs_bmap_extents_to_btree function in fs/xfs/libxfs/xfs_bmap

The xfs_bmap_extents_to_btree function in fs/xfs/libxfs/xfs_bmap.c in the Linux kernel through 4.16.3 allows local users to cause a denial of service (xfs_bmapi_write NULL pointer dereference) via a crafted xfs image.

01What is this vulnerability?

The xfs_bmap_extents_to_btree function in fs/xfs/libxfs/xfs_bmap.c in the Linux kernel through 4.16.3 allows local users to cause a denial of service (xfs_bmapi_write NULL pointer dereference) via a crafted xfs image.

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

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

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: 2018-04-24T06:00:00.000Z
• Last modified: 2024-08-05T07:39:07.321Z

09References

• usn.ubuntu.com — https://usn.ubuntu.com/3752-2/
• usn.ubuntu.com — https://usn.ubuntu.com/3752-3/
• www.securityfocus.com — http://www.securityfocus.com/bid/103959
• www.spinics.net — https://www.spinics.net/lists/linux-xfs/msg17254.html
• www.debian.org — https://www.debian.org/security/2018/dsa-4188
• usn.ubuntu.com — https://usn.ubuntu.com/3754-1/
• bugzilla.kernel.org — https://bugzilla.kernel.org/show_bug.cgi?id=199423
• usn.ubuntu.com — https://usn.ubuntu.com/3752-1/
• usn.ubuntu.com — https://usn.ubuntu.com/4486-1/