CVE-2016-2085

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-04-27 · updated 2026-06-17
Weakness: CWE-19

Description

The evm_verify_hmac function in security/integrity/evm/evm_main.c in the Linux kernel before 4.5 does not properly copy data, which makes it easier for local users to forge MAC values via a timing side-channel attack.

Affected products

Linux kernel: through 4.4.8

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=613317bd212c585c20796c10afe5daaa95d4b0a1
http://www.ubuntu.com/usn/USN-2946-1
http://www.ubuntu.com/usn/USN-2946-2
http://www.ubuntu.com/usn/USN-2947-1
http://www.ubuntu.com/usn/USN-2947-2
http://www.ubuntu.com/usn/USN-2947-3
http://www.ubuntu.com/usn/USN-2948-1
http://www.ubuntu.com/usn/USN-2948-2
http://www.ubuntu.com/usn/USN-2949-1
https://bugzilla.redhat.com/show_bug.cgi?id=1324867
https://github.com/torvalds/linux/commit/613317bd212c585c20796c10afe5daaa95d4b0a1
https://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2085.html

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