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CVE Vulnerability Details :
CVE-2026-31628
PUBLISHED
More InfoOfficial Page
Assigner-Linux
Assigner Org ID-416baaa9-dc9f-4396-8d5f-8c081fb06d67
View Known Exploited Vulnerability (KEV) details
Published At-24 Apr, 2026 | 14:42
Updated At-11 May, 2026 | 22:12
Rejected At-
▼CVE Numbering Authority (CNA)
x86/CPU: Fix FPDSS on Zen1

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
Vendor
Linux Kernel Organization, IncLinux
Product
Linux
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Program Files
  • arch/x86/include/asm/msr-index.h
  • arch/x86/kernel/cpu/amd.c
Default Status
unaffected
Versions
Affected
  • From f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before ed7a3a246309ccc807238f1b4f159ee6d37ff9c4 (git)
  • From f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before 0548529af20e68c6552817834b766646dd3bd7a7 (git)
  • From f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before 1272cfedf4cd1019ddf583917a99b62f2d3645bb (git)
  • From f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before 91f02726b2203b71545713ecb7fb006e60a2d66f (git)
  • From f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before b731aca06387b195058a9f6449a03b62efa1bd10 (git)
  • From f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before ad17f07e95e6e8505e2153e5b391f0d27eacce25 (git)
  • From f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before e6af5286efe5a56128b34032572c9ce9ebeccda3 (git)
  • From f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before 546785c719418c6166834a47e372a88f5f7ae893 (git)
  • From f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 before e55d98e7756135f32150b9b8f75d580d0d4b2dd3 (git)
  • 5abd1583e06b3963e5c9d915760367de86808b78 (git)
  • 4ba461d426490b6ed7e8298c4d3b7a13aa5d2686 (git)
  • 5a63725cd18fcee2af6ec46ccb856b64ad3077b4 (git)
Vendor
Linux Kernel Organization, IncLinux
Product
Linux
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Program Files
  • arch/x86/include/asm/msr-index.h
  • arch/x86/kernel/cpu/amd.c
Default Status
affected
Versions
Affected
  • 4.14
Unaffected
  • From 0 before 4.14 (semver)
  • From 5.10.253 through 5.10.* (semver)
  • From 5.15.203 through 5.15.* (semver)
  • From 6.1.169 through 6.1.* (semver)
  • From 6.6.135 through 6.6.* (semver)
  • From 6.12.82 through 6.12.* (semver)
  • From 6.18.23 through 6.18.* (semver)
  • From 6.19.13 through 6.19.* (semver)
  • From 7.0.1 through 7.0.* (semver)
  • From 7.1-rc1 through * (original_commit_for_fix)
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://git.kernel.org/stable/c/ed7a3a246309ccc807238f1b4f159ee6d37ff9c4
N/A
https://git.kernel.org/stable/c/0548529af20e68c6552817834b766646dd3bd7a7
N/A
https://git.kernel.org/stable/c/1272cfedf4cd1019ddf583917a99b62f2d3645bb
N/A
https://git.kernel.org/stable/c/91f02726b2203b71545713ecb7fb006e60a2d66f
N/A
https://git.kernel.org/stable/c/b731aca06387b195058a9f6449a03b62efa1bd10
N/A
https://git.kernel.org/stable/c/ad17f07e95e6e8505e2153e5b391f0d27eacce25
N/A
https://git.kernel.org/stable/c/e6af5286efe5a56128b34032572c9ce9ebeccda3
N/A
https://git.kernel.org/stable/c/546785c719418c6166834a47e372a88f5f7ae893
N/A
https://git.kernel.org/stable/c/e55d98e7756135f32150b9b8f75d580d0d4b2dd3
N/A
Hyperlink: https://git.kernel.org/stable/c/ed7a3a246309ccc807238f1b4f159ee6d37ff9c4
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/0548529af20e68c6552817834b766646dd3bd7a7
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/1272cfedf4cd1019ddf583917a99b62f2d3645bb
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/91f02726b2203b71545713ecb7fb006e60a2d66f
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/b731aca06387b195058a9f6449a03b62efa1bd10
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/ad17f07e95e6e8505e2153e5b391f0d27eacce25
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/e6af5286efe5a56128b34032572c9ce9ebeccda3
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/546785c719418c6166834a47e372a88f5f7ae893
Resource: N/A
Hyperlink: https://git.kernel.org/stable/c/e55d98e7756135f32150b9b8f75d580d0d4b2dd3
Resource: N/A
Details not found