{"schema":"threatline.record/2","record":{"id":"CVE-2026-98850","aliases":[],"summary":"net/packet: prevent TX_RING byte count overflow","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/packet: prevent TX_RING byte count overflow\n\ntpacket_snd() drains every SEND_REQUEST frame in a TX ring and adds\neach valid packet length to the signed int len_sum. Userspace can\nrecycle completed frames concurrently, so a single blocking send call\nis not bounded by the ring size.\n\nAfter enough successful transmissions len_sum wraps into the negative\nrange. In particular, 65536 65535-byte frames followed by a 65007-byte\nframe produce 0xfffffdef, or -EIOCBQUEUED. sock_sendmsg_nosec() treats\nthat as an impossible return and triggers a BUG. On systems configured\nto panic on oops, a CAP_NET_RAW holder can panic the host kernel.\n\nStop before the next frame would make the byte count exceed INT_MAX.\nThe positive short count leaves that frame pending for a later send\ncall.\n\nA two-thread TPACKET_V2 reproducer triggered the BUG on an arm64 build\nof Linux 7.3-rc4. With this change, the same reproducer returned the\nexpected positive short count without an oops.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98850","source_modified_at":"2026-10-21T12:57:29.795Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1","lessThan":"ae169d318d5d23bac76ece90a7e2b5cb760ed043","status":"affected","versionType":"git"},{"version":"69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1","lessThan":"be12b221c0301111eeb023be04add3c6ad7c21fe","status":"affected","versionType":"git"},{"version":"69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1","lessThan":"69ca64bbb528898916f309552053c32a04a36ebc","status":"affected","versionType":"git"},{"version":"69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1","lessThan":"9fd63d284e251332f4874ef9023cde472f315f86","status":"affected","versionType":"git"},{"version":"69e3c75f4d541a6eb151b3ef91f34033cb3ad6e1","lessThan":"2cf81fc9505b148b1b70068303ea6ea4b1212403","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98850","source_modified_at":"2026-10-21T12:57:29.795Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"2.6.31","status":"affected"},{"version":"0","lessThan":"2.6.31","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","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-2026-98850","source_modified_at":"2026-10-21T12:57:29.795Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"69ca64bbb528898916f309552053c32a04a36ebc","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98850","source_modified_at":"2026-10-21T12:57:29.795Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9fd63d284e251332f4874ef9023cde472f315f86","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98850","source_modified_at":"2026-10-21T12:57:29.795Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"2cf81fc9505b148b1b70068303ea6ea4b1212403","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00157,"percentile":0.04453,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:50:50.062Z","modified_at":"2026-10-21T12:57:29.795Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98850","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:57:29.795Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98850","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/ae169d318d5d23bac76ece90a7e2b5cb760ed043"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/be12b221c0301111eeb023be04add3c6ad7c21fe"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/69ca64bbb528898916f309552053c32a04a36ebc"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/9fd63d284e251332f4874ef9023cde472f315f86"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/2cf81fc9505b148b1b70068303ea6ea4b1212403"}],"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":"2026-10-21T12:57:29.795Z","content_hash":"59835fa5e8d6e1df310dc9a2332975859cd3ee88e1bddbe08b8233324d4e2d8e"}}