{"schema":"threatline.record/2","record":{"id":"CVE-2026-98925","aliases":[],"summary":"bpf, sockmap: Fix self-redirect copied_seq double-counting","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Fix self-redirect copied_seq double-counting\n\nWhen a BPF stream_verdict program redirects an skb back to the same\nsocket (self-redirect with BPF_F_INGRESS), sk_psock_verdict_apply()\ncalls tcp_eat_skb() which advances tcp_sk->copied_seq. However, the\nskb is then delivered to the socket's psock ingress queue and later\nread by tcp_bpf_recvmsg_parser(), which also advances copied_seq via\nthe copied_from_self accounting path. This double-counting causes\ncopied_seq to advance by 2x the actual data length, triggering:\n\n  TCP recvmsg seq # bug 2: copied BF2E806, seq BF2E7FD, \\\n\t\t\t   rcvnxt BF2E806, fl 0\n  WARNING: net/ipv4/tcp.c:2745 at tcp_recvmsg_locked+0x72b/0x2640\n  Call Trace:\n   tcp_recvmsg+0x10a/0x500\n   sock_recvmsg+0x168/0x1d0\n   __sys_recvfrom+0x19a/0x2a0\n   __x64_sys_recvfrom+0xe4/0x1f0\n   do_syscall_64+0xf7/0x530\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n  cleanup rbuf bug: copied BF2E806 seq BF2E806 rcvnxt BF2E806\n  WARNING: net/ipv4/tcp.c:1609 at tcp_cleanup_rbuf+0xf2/0x1c0\n  Call Trace:\n   tcp_recvmsg_locked+0x8d1/0x2640\n   tcp_recvmsg+0x10a/0x500\n   sock_recvmsg+0x168/0x1d0\n   __sys_recvfrom+0x19a/0x2a0\n   __x64_sys_recvfrom+0xe4/0x1f0\n   do_syscall_64+0xf7/0x530\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nFix this by converting self-redirect verdict to __SK_PASS at the\nbeginning of sk_psock_verdict_apply(). This bypasses the\n__SK_REDIRECT case entirely (which calls sk_psock_eat_skb), letting\nthe __SK_PASS path queue the skb to the psock ingress queue. The\ndata is then read via tcp_bpf_recvmsg_parser(), which advances\ncopied_seq exactly once through copied_from_self. Cross-socket\nredirects continue through __SK_REDIRECT with sk_psock_eat_skb()\nunchanged.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98925","source_modified_at":"2026-10-23T12:05:53.207Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"fe735073a50eaa71aceb2e990827fe26f33cddd6","lessThan":"cf9aefb26a071cb8b6fdd761c27e022a1184946d","status":"affected","versionType":"git"},{"version":"e5c6de5fa025882babf89cecbed80acf49b987fa","lessThan":"dc98def81e3c629e25fcdd5753b1db93aab27ce9","status":"affected","versionType":"git"},{"version":"e5c6de5fa025882babf89cecbed80acf49b987fa","lessThan":"ef6f2182fee6b9721c005ccfc6aec0a47f79bbfa","status":"affected","versionType":"git"},{"version":"e5c6de5fa025882babf89cecbed80acf49b987fa","lessThan":"ae1ffd04e98beefbe5d83335d506b0bcd5c2a6b3","status":"affected","versionType":"git"},{"version":"e5c6de5fa025882babf89cecbed80acf49b987fa","lessThan":"88942054191185c6f8bea5568cbb5614d1e99af9","status":"affected","versionType":"git"},{"version":"e5c6de5fa025882babf89cecbed80acf49b987fa","lessThan":"490a83d6386eec1d29f470c8d7331677fb46c3b7","status":"affected","versionType":"git"},{"version":"f9b4a0b537be7a6e5f002ca64b09dcca9c14e6ed","status":"affected","versionType":"git"},{"version":"6.1.32","lessThan":"6.1.189","status":"affected","versionType":"semver"},{"version":"6.3.6","lessThan":"6.4","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98925","source_modified_at":"2026-10-23T12:05:53.207Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.4","status":"affected"},{"version":"0","lessThan":"6.4","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-2026-98925","source_modified_at":"2026-10-23T12:05:53.207Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"88942054191185c6f8bea5568cbb5614d1e99af9","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98925","source_modified_at":"2026-10-23T12:05:53.207Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"490a83d6386eec1d29f470c8d7331677fb46c3b7","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98925","source_modified_at":"2026-10-23T12:05:53.207Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"6.1.189","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98925","source_modified_at":"2026-10-23T12:05:53.207Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Linux","ecosystem":null},"version":"6.4","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-23T12:05:53.207Z","modified_at":"2026-10-23T12:05:53.207Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98925","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T12:05:53.207Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/cf9aefb26a071cb8b6fdd761c27e022a1184946d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/dc98def81e3c629e25fcdd5753b1db93aab27ce9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ef6f2182fee6b9721c005ccfc6aec0a47f79bbfa"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ae1ffd04e98beefbe5d83335d506b0bcd5c2a6b3"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/88942054191185c6f8bea5568cbb5614d1e99af9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/490a83d6386eec1d29f470c8d7331677fb46c3b7"}],"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":"2026-10-23T12:05:53.207Z","content_hash":"8e87ad5c63e0654ba46c4eb1cf2f1432c122df0c4dbf25a6e3e02f64d41bd88b"}}