FKIE_CVE-2026-90121

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-09-17 17:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: irqchip/gic-v5: Clear per-CPU IRS data on teardown IRS affinity setup publishes an IRS pointer and IAFFID state in the per-CPU data before the remaining IRS initialization can fail. The error path then frees the IRS data without clearing that published state, leaving CPUs associated with freed memory. On initialization failure and normal IRS teardown, clear the per-CPU IRS association by removing the stale pointer to irs_data. Also invalidate the per-CPU IAFFID state for any CPUs that were tied to the IRS before it was freed.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3dfc0ab5fefd052c6028c4632b1fad8bdaf7967e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/54937af6f4a0d44c2852a203d457902f3264c906
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/irqchip/irq-gic-v5-irs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "54937af6f4a0d44c2852a203d457902f3264c906",
              "status": "affected",
              "version": "5cb1b6dab2def316671ea2565291a86ad58b884c",
              "versionType": "git"
            },
            {
              "lessThan": "3dfc0ab5fefd052c6028c4632b1fad8bdaf7967e",
              "status": "affected",
              "version": "5cb1b6dab2def316671ea2565291a86ad58b884c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/irqchip/irq-gic-v5-irs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nirqchip/gic-v5: Clear per-CPU IRS data on teardown\n\nIRS affinity setup publishes an IRS pointer and IAFFID state in the\nper-CPU data before the remaining IRS initialization can fail. The\nerror path then frees the IRS data without clearing that published\nstate, leaving CPUs associated with freed memory.\n\nOn initialization failure and normal IRS teardown, clear the per-CPU\nIRS association by removing the stale pointer to irs_data. Also\ninvalidate the per-CPU IAFFID state for any CPUs that were tied to the\nIRS before it was freed."
    }
  ],
  "id": "CVE-2026-90121",
  "lastModified": "2026-09-17T17:17:04.310",
  "metrics": {},
  "published": "2026-09-17T17:17:04.310",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3dfc0ab5fefd052c6028c4632b1fad8bdaf7967e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/54937af6f4a0d44c2852a203d457902f3264c906"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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