CVE-2026-31628: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: x86/CPU: Fix FPDSS on Zen1 Zen1's hardware divider can leave, under certain circumstances, partial results from previous operations. Those results can be leaked by another, attacker thread. Fix that with a chicken bit.

Affected products

• Linux Linux Kernel: from 3.16.58, before 3.17 (fixed in 3.17); from 4.4.144, before 4.5 (fixed in 4.5); from 4.9.102, before 4.10 (fixed in 4.10); from 4.14.1, before 5.10.253 (fixed in 5.10.253); from 5.11, before 5.15.203 (fixed in 5.15.203); from 5.16, before 6.1.169 (fixed in 6.1.169); …

Published 2026-04-24. Last modified 2026-07-14.