{"schema":"threatline.record/2","record":{"id":"CVE-2026-98555","aliases":[],"summary":"llc: fix skb UAF and leaks on llc_mac_hdr_init() failure","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nllc: fix skb UAF and leaks on llc_mac_hdr_init() failure\n\nIn llc_conn_ac_resend_i_xxx_x_set_0_or_send_rr(), if llc_mac_hdr_init()\nfails, kfree_skb(skb) is called instead of kfree_skb(nskb). This leaks\nthe newly allocated nskb, reads from the freed skb via LLC_I_GET_NR(pdu),\nand double-frees skb when llc_conn_state_process() drops its reference.\n\nIn llc_sap_action_send_xid_r() and llc_sap_action_send_test_r(), nskb is\nleaked if llc_mac_hdr_init() returns an error.\n\nFree nskb in all three error paths.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98555","source_modified_at":"2026-10-19T09:21:38.202Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"fec0fe6838a7f45175667701fb51abb23a6ffb1e","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"b859ba18b5a1067f71db5618c6a4a70d55fa308b","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"8b855b645841b5a04e20339a22bb6d593c9b790d","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"d360b31f1a3666579422872aa7d1a751e20b76f9","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"060f827aa3dc47939ee306da715cd6700d129616","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"41dcae82bece9f106b4dff0ee777bba8d157c8a8","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"cb3528ad8bb46fa6252f5d14ced7febddc18515d","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"72f9dd522f8d6c5a00be9695c7bb74631eb5069e","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98555","source_modified_at":"2026-10-19T09:21:38.202Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"2.6.12","status":"affected"},{"version":"0","lessThan":"2.6.12","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-2026-98555","source_modified_at":"2026-10-19T09:21:38.202Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8b855b645841b5a04e20339a22bb6d593c9b790d","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98555","source_modified_at":"2026-10-19T09:21:38.202Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"060f827aa3dc47939ee306da715cd6700d129616","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98555","source_modified_at":"2026-10-19T09:21:38.202Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"41dcae82bece9f106b4dff0ee777bba8d157c8a8","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98555","source_modified_at":"2026-10-19T09:21:38.202Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"72f9dd522f8d6c5a00be9695c7bb74631eb5069e","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.0021,"percentile":0.10712,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:18:22.631Z","modified_at":"2026-10-19T09:21:38.202Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98555","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:21:38.202Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98555","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/fec0fe6838a7f45175667701fb51abb23a6ffb1e"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b859ba18b5a1067f71db5618c6a4a70d55fa308b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8b855b645841b5a04e20339a22bb6d593c9b790d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d360b31f1a3666579422872aa7d1a751e20b76f9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/060f827aa3dc47939ee306da715cd6700d129616"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/41dcae82bece9f106b4dff0ee777bba8d157c8a8"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/cb3528ad8bb46fa6252f5d14ced7febddc18515d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/72f9dd522f8d6c5a00be9695c7bb74631eb5069e"}],"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":"2026-10-19T09:21:38.202Z","content_hash":"36fd75ec27500d24cd93ff8ff8074f6d6e91996bda7b606963c7577fae8fc35a"}}