Vulnerability-Lookup

GHSA-9GRW-FPVR-3468

Vulnerability from github – Published: 2026-04-24 15:32 – Updated: 2026-04-24 15:32

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31628"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-24T15:16:42Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-9grw-fpvr-3468",
  "modified": "2026-04-24T15:32:36Z",
  "published": "2026-04-24T15:32:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31628"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0548529af20e68c6552817834b766646dd3bd7a7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1272cfedf4cd1019ddf583917a99b62f2d3645bb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/546785c719418c6166834a47e372a88f5f7ae893"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/91f02726b2203b71545713ecb7fb006e60a2d66f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ad17f07e95e6e8505e2153e5b391f0d27eacce25"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b731aca06387b195058a9f6449a03b62efa1bd10"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e6af5286efe5a56128b34032572c9ce9ebeccda3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed7a3a246309ccc807238f1b4f159ee6d37ff9c4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-04-25 05:48

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

Linux

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…

Impacted products

Vendor

Product

Version

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: 5abd1583e06b3963e5c9d915760367de86808b78 (git)
Affected: 4ba461d426490b6ed7e8298c4d3b7a13aa5d2686 (git)
Affected: 5a63725cd18fcee2af6ec46ccb856b64ad3077b4 (git)

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)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/include/asm/msr-index.h",
            "arch/x86/kernel/cpu/amd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ed7a3a246309ccc807238f1b4f159ee6d37ff9c4",
              "status": "affected",
              "version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
              "versionType": "git"
            },
            {
              "lessThan": "0548529af20e68c6552817834b766646dd3bd7a7",
              "status": "affected",
              "version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
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            {
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "version": "f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9",
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              "versionType": "git"
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              "version": "5abd1583e06b3963e5c9d915760367de86808b78",
              "versionType": "git"
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            {
              "status": "affected",
              "version": "4ba461d426490b6ed7e8298c4d3b7a13aa5d2686",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5a63725cd18fcee2af6ec46ccb856b64ad3077b4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/include/asm/msr-index.h",
            "arch/x86/kernel/cpu/amd.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.14"
            },
            {
              "lessThan": "4.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.253",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.203",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.169",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.135",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.82",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.23",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.253",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.203",
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                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.1.169",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.135",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.82",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.23",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.13",
                  "versionStartIncluding": "4.14",
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                },
                {
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                  "vulnerable": true
                },
                {
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-25T05:48:27.734Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "title": "x86/CPU: Fix FPDSS on Zen1",
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  "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": "2026-04-25T05:48:27.734Z",
    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date

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

GHSA-9GRW-FPVR-3468

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

Tags

Sightings

Nomenclature