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CVE-2015-8952

Date: October 16, 2016

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.

Language: C

Severity Score

Related Resources (17)

https://lwn.net/Articles/668718/
https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272
https://access.redhat.com/security/cve/CVE-2015-8952
https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac
https://people.canonical.com/~ubuntu-security/cve/CVE-2015-8952
https://bugzilla.redhat.com/show_bug.cgi?id=1360968
https://usn.ubuntu.com/3582-1/
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272
https://usn.ubuntu.com/3582-2/
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee
http://www.openwall.com/lists/oss-security/2016/08/22/2
https://nvd.nist.gov/vuln/detail/CVE-2015-8952
https://bugzilla.kernel.org/show_bug.cgi?id=107301
https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee
http://www.openwall.com/lists/oss-security/2016/08/25/4
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac
https://www.mend.io/vulnerability-database/CVE-2015-8952

Severity Score

Weakness Type (CWE)

Data Handling

CWE-19

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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