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CVE-2026-89727 (GCVE-0-2026-89727)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:46 – Updated: 2026-09-11 19:46
VLAI
Title
KVM: arm64: GICv2: Don't WARN on out-of-range GICV_DIR INTID
Summary
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: GICv2: Don't WARN on out-of-range GICV_DIR INTID vgic_v2_deactivate() passes the INTID a guest wrote to GICV_DIR straight to vgic_get_vcpu_irq(), and treats a failed lookup as a "can't happen" condition with WARN_ON_ONCE(). The guest can make it happen at will, though: for any INTID outside of the implemented SGI, PPI and SPI ranges the lookup returns NULL, since GICv2 has no LPIs. A guest running with EOImode==1 writing such an INTID to GICV_DIR triggers the WARN, and panics hosts running with panic_on_warn. Drop the WARN and ignore failed lookups.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 255de897e7fb918a34845167c572b5bf8e1d9d79 , < 78b95c571d021391153a5ac7981e9e4d5cc856a3 (git)
Affected: 255de897e7fb918a34845167c572b5bf8e1d9d79 , < c6d9c8ac6521d3049ec90ac58bebd23ed03ac496 (git)
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Linux Linux Affected: 6.19
Unaffected: 0 , < 6.19 (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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          "product": "Linux",
          "programFiles": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: GICv2: Don\u0027t WARN on out-of-range GICV_DIR INTID\n\nvgic_v2_deactivate() passes the INTID a guest wrote to GICV_DIR straight\nto vgic_get_vcpu_irq(), and treats a failed lookup as a \"can\u0027t happen\"\ncondition with WARN_ON_ONCE().\n\nThe guest can make it happen at will, though: for any INTID outside of\nthe implemented SGI, PPI and SPI ranges the lookup returns NULL, since\nGICv2 has no LPIs. A guest running with EOImode==1 writing such an INTID\nto GICV_DIR triggers the WARN, and panics hosts running with\npanic_on_warn.\n\nDrop the WARN and ignore failed lookups."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-11T19:46:38.291Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/78b95c571d021391153a5ac7981e9e4d5cc856a3"
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        {
          "url": "https://git.kernel.org/stable/c/c6d9c8ac6521d3049ec90ac58bebd23ed03ac496"
        }
      ],
      "title": "KVM: arm64: GICv2: Don\u0027t WARN on out-of-range GICV_DIR INTID",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89727",
    "datePublished": "2026-09-11T19:46:38.291Z",
    "dateReserved": "2026-09-11T19:38:34.759Z",
    "dateUpdated": "2026-09-11T19:46:38.291Z",
    "state": "PUBLISHED"
  },
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    "redhat_vex": {
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      "cve": "CVE-2026-89727",
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      "product_status:known_affected": "76",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: KVM: arm64: GICv2: Don\u0027t WARN on out-of-range GICV_DIR INTID",
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      "cve": "CVE-2026-89727",
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      "product_status:known_not_affected": "353",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89727",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89727.json",
      "version": "4"
    }
  }
}



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