CVE-2026-31628 (GCVE-0-2026-31628)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-04-27 11:01
VLAI?
Title
x86/CPU: Fix FPDSS on Zen1
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < ed7a3a246309ccc807238f1b4f159ee6d37ff9c4 (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < 0548529af20e68c6552817834b766646dd3bd7a7 (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < 1272cfedf4cd1019ddf583917a99b62f2d3645bb (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < 91f02726b2203b71545713ecb7fb006e60a2d66f (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < b731aca06387b195058a9f6449a03b62efa1bd10 (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < ad17f07e95e6e8505e2153e5b391f0d27eacce25 (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < e6af5286efe5a56128b34032572c9ce9ebeccda3 (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < 546785c719418c6166834a47e372a88f5f7ae893 (git)
Affected: f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9 , < e55d98e7756135f32150b9b8f75d580d0d4b2dd3 (git)
Affected: 5abd1583e06b3963e5c9d915760367de86808b78 (git)
Affected: 4ba461d426490b6ed7e8298c4d3b7a13aa5d2686 (git)
Affected: 5a63725cd18fcee2af6ec46ccb856b64ad3077b4 (git)
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    Linux Linux Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.169 , ≤ 6.1.* (semver)
Unaffected: 6.6.135 , ≤ 6.6.* (semver)
Unaffected: 6.12.82 , ≤ 6.12.* (semver)
Unaffected: 6.18.23 , ≤ 6.18.* (semver)
Unaffected: 6.19.13 , ≤ 6.19.* (semver)
Unaffected: 7.0.1 , ≤ 7.0.* (semver)
Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)
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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.