Vulnerability-Lookup

FKIE_CVE-2026-31628

Vulnerability from fkie_nvd - Published: 2026-04-24 15:16 - Updated: 2026-04-27 20:40

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0548529af20e68c6552817834b766646dd3bd7a7	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1272cfedf4cd1019ddf583917a99b62f2d3645bb	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/546785c719418c6166834a47e372a88f5f7ae893	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/91f02726b2203b71545713ecb7fb006e60a2d66f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ad17f07e95e6e8505e2153e5b391f0d27eacce25	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b731aca06387b195058a9f6449a03b62efa1bd10	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e55d98e7756135f32150b9b8f75d580d0d4b2dd3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e6af5286efe5a56128b34032572c9ce9ebeccda3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ed7a3a246309ccc807238f1b4f159ee6d37ff9c4	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	4.14

JSON

To clipboard

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

Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-05-23 16:05

Title

x86/CPU: Fix FPDSS on Zen1

Summary

Severity

No CVSS data available.

Assigner

Linux

References

9 references

URL	Tags
https://git.kernel.org/stable/c/ed7a3a246309ccc80…
https://git.kernel.org/stable/c/0548529af20e68c65…
https://git.kernel.org/stable/c/1272cfedf4cd1019d…
https://git.kernel.org/stable/c/91f02726b2203b715…
https://git.kernel.org/stable/c/b731aca06387b1950…
https://git.kernel.org/stable/c/ad17f07e95e6e8505…
https://git.kernel.org/stable/c/e6af5286efe5a5612…
https://git.kernel.org/stable/c/546785c719418c616…
https://git.kernel.org/stable/c/e55d98e7756135f32…

Impacted products

2 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) Affected: 3.16.58 , < 3.17 (semver) Affected: 4.4.144 , < 4.5 (semver) Affected: 4.9.102 , < 4.10 (semver)
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)

Show details on NVD website

JSON

To clipboard

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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/CPU: Fix FPDSS on Zen1\n\nZen1\u0027s hardware divider can leave, under certain circumstances, partial\nresults from previous operations.  Those results can be leaked by\nanother, attacker thread.\n\nFix that with a chicken bit."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T16:05:37.627Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ed7a3a246309ccc807238f1b4f159ee6d37ff9c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/0548529af20e68c6552817834b766646dd3bd7a7"
        },
        {
          "url": "https://git.kernel.org/stable/c/1272cfedf4cd1019ddf583917a99b62f2d3645bb"
        },
        {
          "url": "https://git.kernel.org/stable/c/91f02726b2203b71545713ecb7fb006e60a2d66f"
        },
        {
          "url": "https://git.kernel.org/stable/c/b731aca06387b195058a9f6449a03b62efa1bd10"
        },
        {
          "url": "https://git.kernel.org/stable/c/ad17f07e95e6e8505e2153e5b391f0d27eacce25"
        },
        {
          "url": "https://git.kernel.org/stable/c/e6af5286efe5a56128b34032572c9ce9ebeccda3"
        },
        {
          "url": "https://git.kernel.org/stable/c/546785c719418c6166834a47e372a88f5f7ae893"
        },
        {
          "url": "https://git.kernel.org/stable/c/e55d98e7756135f32150b9b8f75d580d0d4b2dd3"
        }
      ],
      "title": "x86/CPU: Fix FPDSS on Zen1",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31628",
    "datePublished": "2026-04-24T14:42:49.181Z",
    "dateReserved": "2026-03-09T15:48:24.124Z",
    "dateUpdated": "2026-05-23T16:05:37.627Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Action not permitted

FKIE_CVE-2026-31628

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

Tags

Sightings

Nomenclature