CVE-2026-90121 (GCVE-0-2026-90121)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:06 – Updated: 2026-10-19 08:58
VLAI
Title
irqchip/gic-v5: Clear per-CPU IRS data on teardown
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6639 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 5cb1b6dab2def316671ea2565291a86ad58b884c , < 0887d41abf76638942688cb0c0ff8087f52e2b33 (git)
Affected: 5cb1b6dab2def316671ea2565291a86ad58b884c , < 54937af6f4a0d44c2852a203d457902f3264c906 (git)
Affected: 5cb1b6dab2def316671ea2565291a86ad58b884c , < 3dfc0ab5fefd052c6028c4632b1fad8bdaf7967e (git)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.57 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "drivers/irqchip/irq-gic-v5-irs.c"
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        }
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      "providerMetadata": {
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    "datePublished": "2026-09-17T16:06:25.253Z",
    "dateReserved": "2026-09-11T19:38:34.787Z",
    "dateUpdated": "2026-10-19T08:58:19.637Z",
    "state": "PUBLISHED"
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          {
            "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": "2026-10-19T09:19:01.617",
        "metrics": {},
        "published": "2026-09-17T17:17:04.310",
        "references": [
          {
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      "status": "final",
      "title": "kernel: irqchip/gic-v5: Clear per-CPU IRS data on teardown",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90121.json",
      "version": "3"
    }
  }
}



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