{"schema":"threatline.record/2","record":{"id":"CVE-2026-98631","aliases":[],"summary":"xsk: Use a 32-bit compare in xsk_map_gen_lookup","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Use a 32-bit compare in xsk_map_gen_lookup\n\nxsk_map_gen_lookup() loads a u32 key and compares it with max_entries\nusing BPF_JMP_IMM. BPF immediates are sign-extended to 64 bits, so a\nmax_entries value of 0x80000000 or higher becomes a threshold larger\nthan every zero-extended 32-bit key. An out-of-range index then skips\nthe bounds check and the generated lookup reads past xsk_map[].\n\nCompare with BPF_JMP32_IMM so the check stays in 32-bit unsigned range.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98631","source_modified_at":"2026-10-19T09:22:59.147Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"e65650f291ee72fc578d6346080fc4699204ef2c","lessThan":"c6d5c582d55a8f229d75e98d62eaa065b0deb18d","status":"affected","versionType":"git"},{"version":"e65650f291ee72fc578d6346080fc4699204ef2c","lessThan":"227ec890559e922e235eb543646e3bf0bd8269b0","status":"affected","versionType":"git"},{"version":"e65650f291ee72fc578d6346080fc4699204ef2c","lessThan":"11d9be35c1f4233798e99be98bc474f83a254c6c","status":"affected","versionType":"git"},{"version":"e65650f291ee72fc578d6346080fc4699204ef2c","lessThan":"123f90f394ca404ab8796a7c8072ff7fa5b65a9c","status":"affected","versionType":"git"},{"version":"e65650f291ee72fc578d6346080fc4699204ef2c","lessThan":"36461e58f88a1b723f86693f437ac12e60ff4363","status":"affected","versionType":"git"},{"version":"e65650f291ee72fc578d6346080fc4699204ef2c","lessThan":"b5c0cff0c5331582ab01c4c423731453a8381acc","status":"affected","versionType":"git"},{"version":"e65650f291ee72fc578d6346080fc4699204ef2c","lessThan":"3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24","status":"affected","versionType":"git"},{"version":"e65650f291ee72fc578d6346080fc4699204ef2c","lessThan":"70504de0bb627848667207bec7ccfd647deb8814","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98631","source_modified_at":"2026-10-19T09:22:59.147Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.5","status":"affected"},{"version":"0","lessThan":"5.5","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.55","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.9","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-2026-98631","source_modified_at":"2026-10-19T09:22:59.147Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"227ec890559e922e235eb543646e3bf0bd8269b0","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98631","source_modified_at":"2026-10-19T09:22:59.147Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"11d9be35c1f4233798e99be98bc474f83a254c6c","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98631","source_modified_at":"2026-10-19T09:22:59.147Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"123f90f394ca404ab8796a7c8072ff7fa5b65a9c","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98631","source_modified_at":"2026-10-19T09:22:59.147Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"36461e58f88a1b723f86693f437ac12e60ff4363","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98631","source_modified_at":"2026-10-19T09:22:59.147Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98631","source_modified_at":"2026-10-19T09:22:59.147Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"70504de0bb627848667207bec7ccfd647deb8814","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.0021,"percentile":0.10725,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:19:53.529Z","modified_at":"2026-10-19T09:22:59.147Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98631","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:22:59.147Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98631","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/c6d5c582d55a8f229d75e98d62eaa065b0deb18d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/227ec890559e922e235eb543646e3bf0bd8269b0"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/11d9be35c1f4233798e99be98bc474f83a254c6c"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/123f90f394ca404ab8796a7c8072ff7fa5b65a9c"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/36461e58f88a1b723f86693f437ac12e60ff4363"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b5c0cff0c5331582ab01c4c423731453a8381acc"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/70504de0bb627848667207bec7ccfd647deb8814"}],"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":"2026-10-19T09:22:59.147Z","content_hash":"ec0d4b49808be772480053d2f09a73caf3de194583e7560695475cfa7491234e"}}