KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq

{
  "id": "ab8e69ad76d80bcc20fab4120c54ae74e18a1240dd47f51a9f4864f3bb028260",
  "url": "https://osv.dev/vulnerability/CVE-2026-98712",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq Referencing the last interrupt inserted in an LR is rather fragile, as this interrupt can vanish if a concurrently unmapped LPI. Solve this by bumping up the refcount on the interrupt when populating last_lr_irq, and drop it at vgic_prune_ap_list() time, when LPIs are being reclaimed.",
    "evidence": "osv:CVE-2026-98712",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.2.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98712",
      "aliases": [
        "CVE-2026-98712"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "6da5e537f5afe091658e846da1949d7e557d2ade"
                },
                {
                  "fixed": "8b25393d16a5ca8df907bd7ee1ff2e9d85678b3c"
                },
                {
                  "fixed": "19bc5d79ece613f242b5ec03921a3b465321bfed"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6.19.9"
                },
                {
                  "fixed": "6.20"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "cd28ca4c27ed5929f61bbed8a967c20519facb88"
                }
              ]
            }
          ],
          "versions": [
            "v6.19.14",
            "v6.19.13",
            "v6.19.12",
            "v6.19.11",
            "v6.19.10",
            "v6.19.9"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98712.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "7.0.0"
                },
                {
                  "fixed": "7.2.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98712.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.554694723Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/19bc5d79ece613f242b5ec03921a3b465321bfed",
        "https://git.kernel.org/stable/c/8b25393d16a5ca8df907bd7ee1ff2e9d85678b3c",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98712.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98712",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98712.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98712",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 519078,
  "published_at": "2026-10-18T15:46:44.857+00:00"
}