{"schema":"threatline.record/2","record":{"id":"CVE-2026-98713","aliases":[],"summary":"KVM: arm64: Apply the fine-grained UNDEFs without FEAT_FGT","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]","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98713","source_modified_at":"2026-10-19T09:24:24.367Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f","lessThan":"2f4a15c52a552c5244ec27f4ca8bda855594f918","status":"affected","versionType":"git"},{"version":"f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f","lessThan":"1113374a17d7f7d16b02ee0bbd9b1e7a60cbb087","status":"affected","versionType":"git"},{"version":"f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f","lessThan":"af3300b3a6bace925a496f3520e171c07b999c72","status":"affected","versionType":"git"},{"version":"f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f","lessThan":"4bdd2b3a708c1feb701cb8b62feb8ad2fd77bb07","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98713","source_modified_at":"2026-10-19T09:24:24.367Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.9","status":"affected"},{"version":"0","lessThan":"6.9","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.56","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.10","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98713","source_modified_at":"2026-10-19T09:24:24.367Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"2f4a15c52a552c5244ec27f4ca8bda855594f918","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98713","source_modified_at":"2026-10-19T09:24:24.367Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"1113374a17d7f7d16b02ee0bbd9b1e7a60cbb087","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98713","source_modified_at":"2026-10-19T09:24:24.367Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"4bdd2b3a708c1feb701cb8b62feb8ad2fd77bb07","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.05722,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:46:45.902Z","modified_at":"2026-10-19T09:24:24.367Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98713","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:24:24.367Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98713","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/2f4a15c52a552c5244ec27f4ca8bda855594f918"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/1113374a17d7f7d16b02ee0bbd9b1e7a60cbb087"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/af3300b3a6bace925a496f3520e171c07b999c72"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/4bdd2b3a708c1feb701cb8b62feb8ad2fd77bb07"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:24:24.367Z","content_hash":"ea6883f383f9c787886091f7cf72ad55551e54445a642bc9157ec2e68f5458ae"}}