CVE-2015-8539 Privilege escalation in n/a

What is CVE-2015-8539?

CVE-2015-8539 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 8 Feb 2016. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-269

Which versions are affected by CVE-2015-8539?

It affects 3 products.

Products include Canonical Ubuntu Linux, Linux kernel, Suse Linux Enterprise Real Time Extension.

How do I fix CVE-2015-8539?

Apply the vendor's patch.

Is CVE-2015-8539 being exploited?

There is no known exploitation of CVE-2015-8539 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-6m9m-6qjp-9mm8, SUSE-SU-2016:0336-1, SUSE-SU-2016:0339-1, UBUNTU-CVE-2015-8539.