CVE-2015-8952

Severity

21%

Complexity

39%

Confidentiality

48%

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.

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.

CVSS 3.0 Base Score 5.5. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 2.1. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:N/I:N/A:P).

Overview

First reported 8 years ago

2016-10-16 21:59:00

Last updated 6 years ago

2018-03-16 01:29:00

Affected Software

Linux Kernel

References

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://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac

Patch

[oss-security] 20160822 CVE request: Linux kernel mbcache lock contention denial of service.

Third Party Advisory

[oss-security] 20160825 Re: CVE request: Linux kernel mbcache lock contention denial of service.

Patch, Third Party Advisory

https://bugzilla.kernel.org/show_bug.cgi?id=107301

Issue Tracking, Third Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=1360968

Issue Tracking, Third Party Advisory, VDB Entry

https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272

Vendor Advisory

https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee

Issue Tracking, Patch

https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac

Issue Tracking

https://lwn.net/Articles/668718/

Third Party Advisory

USN-3582-1

USN-3582-2

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