CVE-2015-5706: Canonical Ubuntu Linux

Medium severity, CVSS 4.6. EPSS: 0.4% chance of exploitation in the next 30 days.

Use-after-free vulnerability in the path_openat function in fs/namei.c in the Linux kernel 3.x and 4.x before 4.0.4 allows local users to cause a denial of service or possibly have unspecified other impact via O_TMPFILE filesystem operations that leverage a duplicate cleanup operation.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only
• Debian Debian Linux: version 7.0 only; version 8.0 only
• Linux Linux Kernel: from 3.0, up to and including 3.19.8; from 4.0, before 4.0.4 (fixed in 4.0.4)

Published 2015-08-31. Last modified 2026-06-17.