CVE-2015-8952

Name: CVE-2015-8952
Creator: NVD / NIST
Published: 2016-10-16T21:59:01.91+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.45%

Last modified Jun 17, 2026

CVE-2015-8952 is a vulnerability of currently unknown severity. The mbcache feature in the ext2 and ext4 filesystem implementations in the Linux kernel before 4.6 mishandles xattr block caching, which allows local users to cause a denial of service (soft lockup) via filesystem operations in environments that use many attributes, as demonstrated by Ceph and Samba.. EPSS estimates a 0.45% chance of exploitation in the next 30 days.

Description

The mbcache feature in the ext2 and ext4 filesystem implementations in the Linux kernel before 4.6 mishandles xattr block caching, which allows local users to cause a denial of service (soft lockup) via filesystem operations in environments that use many attributes, as demonstrated by Ceph and Samba.

Metrics

EPSS Probability

0.45%

36.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-19

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	<= 4.5.7

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272Patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70eePatch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38acPatch
http://www.openwall.com/lists/oss-security/2016/08/22/2Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/08/25/4Patch, Third Party Advisory
https://bugzilla.kernel.org/show_bug.cgi?id=107301Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1360968Issue Tracking, Third Party Advisory, VDB Entry
https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272Vendor Advisory
https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70eeIssue Tracking, Patch
https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38acIssue Tracking
https://lwn.net/Articles/668718/Third Party Advisory
https://usn.ubuntu.com/3582-1/
https://usn.ubuntu.com/3582-2/
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272Patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70eePatch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38acPatch
http://www.openwall.com/lists/oss-security/2016/08/22/2Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/08/25/4Patch, Third Party Advisory
https://bugzilla.kernel.org/show_bug.cgi?id=107301Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1360968Issue Tracking, Third Party Advisory, VDB Entry
https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272Vendor Advisory
https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70eeIssue Tracking, Patch
https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38acIssue Tracking
https://lwn.net/Articles/668718/Third Party Advisory
https://usn.ubuntu.com/3582-1/
https://usn.ubuntu.com/3582-2/

Timeline

Published: Oct 16, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-8952?

How severe is CVE-2015-8952?

Severity scoring for CVE-2015-8952 is pending analysis. The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.

How do I fix CVE-2015-8952?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-8952?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST