{"schema":"threatline.record/2","record":{"id":"CVE-2026-98482","aliases":[],"summary":"nfc: llcp: drop truncated I/RR/RNR PDUs in nfc_llcp_recv_hdlc()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: drop truncated I/RR/RNR PDUs in nfc_llcp_recv_hdlc()\n\nnfc_llcp_recv_hdlc() reads the sequence byte skb->data[2], via\nnfc_llcp_ns()/nfc_llcp_nr(), before any length check. The receive path\nonly guarantees the two-byte LLCP header -- __nfc_llcp_recv() checks it\nwith pskb_may_pull() and nfc_llcp_recv_agf() admits two-byte inner PDUs\n-- so a two-byte I, RR or RNR PDU reads one byte of uninitialised skb\ntailroom. The byte becomes N(R)/N(S); a peer can already set those with\na well-formed PDU, so this is acting on uninitialised memory, not new\npeer control.\n\nGuard the read with pskb_may_pull(), as commit 95674f506c63 (\"nfc: llcp:\nreject PDUs shorter than the LLCP header\") did for the two-byte header,\nso the sequence byte is present and linear before it is read. RR and RNR\nPDUs are LLCP_HEADER_SIZE + LLCP_SEQUENCE_SIZE bytes and an I PDU is\nlonger, so no valid frame is rejected; a truncated PDU is malformed, so\nreturn without a DM reply.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98482","source_modified_at":"2026-10-19T09:20:19.712Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"d646960f7986fefb460a2b062d5ccc8ccfeacc3a","lessThan":"3afdbebfee2ef7e9510880868cfb482cbffe6836","status":"affected","versionType":"git"},{"version":"d646960f7986fefb460a2b062d5ccc8ccfeacc3a","lessThan":"9b4086eb67a9a3b1ce69fef1b6793827363703ce","status":"affected","versionType":"git"},{"version":"d646960f7986fefb460a2b062d5ccc8ccfeacc3a","lessThan":"51b6d73373589abb9de4d84767b0db1bc8d395d9","status":"affected","versionType":"git"},{"version":"d646960f7986fefb460a2b062d5ccc8ccfeacc3a","lessThan":"066205553a0106565bcede934f5721c25ebd6e4e","status":"affected","versionType":"git"},{"version":"d646960f7986fefb460a2b062d5ccc8ccfeacc3a","lessThan":"18f60ee882403d5b48097f5f6ae45f794e4cc643","status":"affected","versionType":"git"},{"version":"d646960f7986fefb460a2b062d5ccc8ccfeacc3a","lessThan":"810f204ef8f61f0c930cf6b3280050b3ee6a8ae7","status":"affected","versionType":"git"},{"version":"d646960f7986fefb460a2b062d5ccc8ccfeacc3a","lessThan":"744e61bd06188d8bb068c26a461c252f242b05c9","status":"affected","versionType":"git"},{"version":"d646960f7986fefb460a2b062d5ccc8ccfeacc3a","lessThan":"273f9d667cde649f8de9d72b1303cc2f4b658c50","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98482","source_modified_at":"2026-10-19T09:20:19.712Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"3.3","status":"affected"},{"version":"0","lessThan":"3.3","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-2026-98482","source_modified_at":"2026-10-19T09:20:19.712Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"3afdbebfee2ef7e9510880868cfb482cbffe6836","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98482","source_modified_at":"2026-10-19T09:20:19.712Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9b4086eb67a9a3b1ce69fef1b6793827363703ce","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98482","source_modified_at":"2026-10-19T09:20:19.712Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"51b6d73373589abb9de4d84767b0db1bc8d395d9","basis":"first unaffected version stated in the CVE record"},{"source":"CVE 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List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98482","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:20:19.712Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98482","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/3afdbebfee2ef7e9510880868cfb482cbffe6836"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/9b4086eb67a9a3b1ce69fef1b6793827363703ce"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/51b6d73373589abb9de4d84767b0db1bc8d395d9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/066205553a0106565bcede934f5721c25ebd6e4e"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/18f60ee882403d5b48097f5f6ae45f794e4cc643"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/810f204ef8f61f0c930cf6b3280050b3ee6a8ae7"},{"source":"CVE 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