Bug 2461569 (CVE-2026-31628) - CVE-2026-31628 kernel: x86/CPU: Fix FPDSS on Zen1
Summary: CVE-2026-31628 kernel: x86/CPU: Fix FPDSS on Zen1
Keywords:
Status: NEW
Alias: CVE-2026-31628
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-24 15:08 UTC by OSIDB Bzimport
Modified: 2026-04-24 20:41 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-04-24 15:08:59 UTC 
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.
Comment 1 Keith Grant 2026-04-24 20:39:04 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026042428-CVE-2026-31628-8187@gregkh/T
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