{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-98925", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.380Z", "datePublished": "2026-10-23T12:05:53.207Z", "dateUpdated": "2026-10-23T12:05:53.207Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-23T12:05:53.207Z" }, "descriptions": [ { "lang": "en", "value": "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." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/core/skmsg.c" ], "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" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/core/skmsg.c" ], "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" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.32", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.12.112" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.18.55" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.2.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3.6" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/cf9aefb26a071cb8b6fdd761c27e022a1184946d" }, { "url": "https://git.kernel.org/stable/c/dc98def81e3c629e25fcdd5753b1db93aab27ce9" }, { "url": "https://git.kernel.org/stable/c/ef6f2182fee6b9721c005ccfc6aec0a47f79bbfa" }, { "url": "https://git.kernel.org/stable/c/ae1ffd04e98beefbe5d83335d506b0bcd5c2a6b3" }, { "url": "https://git.kernel.org/stable/c/88942054191185c6f8bea5568cbb5614d1e99af9" }, { "url": "https://git.kernel.org/stable/c/490a83d6386eec1d29f470c8d7331677fb46c3b7" } ], "title": "bpf, sockmap: Fix self-redirect copied_seq double-counting", "x_generator": { "engine": "bippy-1.2.0" } } } }