KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions

{
  "id": "17f4c3bb7d2d00892a3bdbe272eab7f07f093103f87ffa8079da83906de60428",
  "url": "https://osv.dev/vulnerability/CVE-2026-80873",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions kvm_inject_el2_exception() writes ESR_EL2 for synchronous exceptions but not for SError. enter_exception64() does not write ESR_ELx for any exception type, so the constructed syndrome is dropped. A guest L2 hypervisor taking a nested SError observes stale ESR_EL2. This affects both kvm_inject_nested_serror() and the EASE path in kvm_inject_nested_sea(). Write ESR_EL2 for except_type_serror, matching except_type_sync.",
    "evidence": "osv:CVE-2026-80873",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.40",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-80873",
      "aliases": [
        "CVE-2026-80873"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "77ee70a073575977b403e9add25f185d614217d8"
                },
                {
                  "fixed": "09f35145f3a4aacea4d9b914ad895bf5af8fc4ae"
                },
                {
                  "fixed": "29227821e2320ff6a174c91742b4ce221fe8d563"
                },
                {
                  "fixed": "e2cb1f4578625e71f461d5c1ce70984193389cbb"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80873.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.17.0"
                },
                {
                  "fixed": "6.18.40"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80873.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.884907931Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/09f35145f3a4aacea4d9b914ad895bf5af8fc4ae",
        "https://git.kernel.org/stable/c/29227821e2320ff6a174c91742b4ce221fe8d563",
        "https://git.kernel.org/stable/c/e2cb1f4578625e71f461d5c1ce70984193389cbb",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80873.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-80873",
        "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/2026/80xxx/CVE-2026-80873.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-80873",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 492578,
  "published_at": "2026-09-04T16:48:40.889+00:00"
}