GHSA-9GRW-FPVR-3468

Vulnerability from github – Published: 2026-04-24 15:32 – Updated: 2026-10-15 03:35
VLAI
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.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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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": "MODERATE"
  },
  "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": "2026-10-15T03:35:42Z",
  "published": "2026-04-24T15:32:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31628"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
    },
    {
      "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/e55d98e7756135f32150b9b8f75d580d0d4b2dd3"
    },
    {
      "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": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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