{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f"
            },
            {
              "fixed": "2f4a15c52a552c5244ec27f4ca8bda855594f918"
            },
            {
              "fixed": "1113374a17d7f7d16b02ee0bbd9b1e7a60cbb087"
            },
            {
              "fixed": "af3300b3a6bace925a496f3520e171c07b999c72"
            },
            {
              "fixed": "4bdd2b3a708c1feb701cb8b62feb8ad2fd77bb07"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.9.0"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.56"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98713.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Apply the fine-grained UNDEFs without FEAT_FGT\n\nFGUs don't actually require hardware support, so don't gate fgt trap\nconfig insertion on FGT. This is the only action required to allow FGUs\nalways, as kvm_calculate_traps() already computes the FGU bits with or\nwithout FEAT_FGT.\n\nThis also fixes a spurious WARN when a TLBI OS is run on a guest in vEL1\nwithout FEAT_TLBIOS on non FEAT_FGT hardware. In this configuration the\ncourse-grained HCR_EL2.TTLBOS trap reaches the handler handle_tlbi_el1(),\nwhich expects an EL1 TLBI only from vEL2. With FGUs enabled the UNDEF\nwill be injected without needing the specific handler.\n\n[oliver: Take Wei-Lin's suggested changelog]",
  "id": "CVE-2026-98713",
  "modified": "2026-10-20T02:30:25.149617357Z",
  "published": "2026-10-18T15:46:45.902Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1113374a17d7f7d16b02ee0bbd9b1e7a60cbb087"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2f4a15c52a552c5244ec27f4ca8bda855594f918"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4bdd2b3a708c1feb701cb8b62feb8ad2fd77bb07"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/af3300b3a6bace925a496f3520e171c07b999c72"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98713.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98713"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "KVM: arm64: Apply the fine-grained UNDEFs without FEAT_FGT"
}