CVE-2015-8952

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.08%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1360968 issue tracking vdb entry third party advisory
https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac issue tracking
https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272 vendor advisory
https://usn.ubuntu.com/3582-1/ vendor advisory
https://bugzilla.kernel.org/show_bug.cgi?id=107301 issue tracking third party advisory
http://www.openwall.com/lists/oss-security/2016/08/25/4 mailing list third party advisory patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272 patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee patch
http://www.openwall.com/lists/oss-security/2016/08/22/2 third party advisory mailing list
https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee issue tracking patch
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac patch
https://lwn.net/Articles/668718/ third party advisory
https://usn.ubuntu.com/3582-2/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2015-8952?
CVE-2015-8952 has been scored as a medium severity vulnerability.
How to fix CVE-2015-8952?
To fix CVE-2015-8952, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-8952 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2015-8952 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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