{"id":"CVE-2026-98713","revision":"f07b8073ebaf48168f6079cdd611ac02","records":[{"revision":"f07b8073ebaf48168f6079cdd611ac02","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98713","aliases":[],"title":"KVM: arm64: Apply the fine-grained UNDEFs without FEAT_FGT","description":"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]","state":0,"publishedAt":"2026-10-18T15:46:45.902+00:00","modifiedAt":"2026-10-19T09:24:24.367+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"arch/arm64/kvm/emulate-nested.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f\",\n                            \"lessThan\": \"2f4a15c52a552c5244ec27f4ca8bda855594f918\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f\",\n                            \"lessThan\": \"1113374a17d7f7d16b02ee0bbd9b1e7a60cbb087\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f\",\n                            \"lessThan\": \"af3300b3a6bace925a496f3520e171c07b999c72\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f5a5a406b4b8bb6c1fc7a1e92a872bd86061a53f\",\n                            \"lessThan\": \"4bdd2b3a708c1feb701cb8b62feb8ad2fd77bb07\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"arch/arm64/kvm/emulate-nested.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.9\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.113\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.56\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.10\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/2f4a15c52a552c5244ec27f4ca8bda855594f918","https://git.kernel.org/stable/c/1113374a17d7f7d16b02ee0bbd9b1e7a60cbb087","https://git.kernel.org/stable/c/af3300b3a6bace925a496f3520e171c07b999c72","https://git.kernel.org/stable/c/4bdd2b3a708c1feb701cb8b62feb8ad2fd77bb07"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98713","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98713","identifiers":["CVE-2026-98713"]},"retained":false,"historicalAffected":[]}],"coverage":[]}