CVE-2015-8539

moderate-risk
Published 2016-02-08

The KEYS subsystem in the Linux kernel before 4.4 allows local users to gain privileges or cause a denial of service (BUG) via crafted keyctl commands that negatively instantiate a key, related to security/keys/encrypted-keys/encrypted.c, security/keys/trusted.c, and security/keys/user_defined.c.

Do I need to act?

-
0.07% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (6)

Affected Vendors

Suse Linux Canonical

References (48)

Vendor Advisory http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=096fe9...
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00007.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00008.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00009.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00011.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00017.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00018.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00019.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00020.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00021.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00022.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00034.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
Issue Tracking http://www.openwall.com/lists/oss-security/2015/12/09/1
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0151
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0152
Third Party Advisory https://access.redhat.com/errata/RHSA-2018:0181
and 28 more references
37
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 0/34 · Minimal
Exposure 13/34 · Low