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FKIE_CVE-2026-89727

Vulnerability from fkie_nvd - Published: 2026-09-11 20:20 - Updated: 2026-09-11 20:20
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/78b95c571d021391153a5ac7981e9e4d5cc856a3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c6d9c8ac6521d3049ec90ac58bebd23ed03ac496
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/kvm/vgic/vgic-v2.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "78b95c571d021391153a5ac7981e9e4d5cc856a3",
              "status": "affected",
              "version": "255de897e7fb918a34845167c572b5bf8e1d9d79",
              "versionType": "git"
            },
            {
              "lessThan": "c6d9c8ac6521d3049ec90ac58bebd23ed03ac496",
              "status": "affected",
              "version": "255de897e7fb918a34845167c572b5bf8e1d9d79",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/kvm/vgic/vgic-v2.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "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\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."
    }
  ],
  "id": "CVE-2026-89727",
  "lastModified": "2026-09-11T20:20:03.027",
  "metrics": {},
  "published": "2026-09-11T20:20:03.027",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/78b95c571d021391153a5ac7981e9e4d5cc856a3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c6d9c8ac6521d3049ec90ac58bebd23ed03ac496"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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