228 lines
12 KiB
JSON
228 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-98925",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-25T10:25:14.380Z",
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"datePublished": "2026-10-23T12:05:53.207Z",
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"dateUpdated": "2026-10-23T12:05:53.207Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-23T12:05:53.207Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/core/skmsg.c"
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],
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"versions": [
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{
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"version": "fe735073a50eaa71aceb2e990827fe26f33cddd6",
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"lessThan": "cf9aefb26a071cb8b6fdd761c27e022a1184946d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "e5c6de5fa025882babf89cecbed80acf49b987fa",
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"lessThan": "dc98def81e3c629e25fcdd5753b1db93aab27ce9",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "e5c6de5fa025882babf89cecbed80acf49b987fa",
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"lessThan": "ef6f2182fee6b9721c005ccfc6aec0a47f79bbfa",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "e5c6de5fa025882babf89cecbed80acf49b987fa",
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"lessThan": "ae1ffd04e98beefbe5d83335d506b0bcd5c2a6b3",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "e5c6de5fa025882babf89cecbed80acf49b987fa",
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"lessThan": "88942054191185c6f8bea5568cbb5614d1e99af9",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "e5c6de5fa025882babf89cecbed80acf49b987fa",
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"lessThan": "490a83d6386eec1d29f470c8d7331677fb46c3b7",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f9b4a0b537be7a6e5f002ca64b09dcca9c14e6ed",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6.1.32",
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"lessThan": "6.1.189",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.3.6",
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"lessThan": "6.4",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/core/skmsg.c"
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],
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"versions": [
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{
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"version": "6.4",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.4",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.189",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.158",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.112",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.55",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.9",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.1.32",
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"versionEndExcluding": "6.1.189"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.4",
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"versionEndExcluding": "6.6.158"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.4",
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"versionEndExcluding": "6.12.112"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.4",
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"versionEndExcluding": "6.18.55"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.4",
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"versionEndExcluding": "7.2.9"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.4",
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"versionEndExcluding": "7.3"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.3.6"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/cf9aefb26a071cb8b6fdd761c27e022a1184946d"
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},
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{
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"url": "https://git.kernel.org/stable/c/dc98def81e3c629e25fcdd5753b1db93aab27ce9"
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},
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{
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"url": "https://git.kernel.org/stable/c/ef6f2182fee6b9721c005ccfc6aec0a47f79bbfa"
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},
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{
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"url": "https://git.kernel.org/stable/c/ae1ffd04e98beefbe5d83335d506b0bcd5c2a6b3"
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},
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{
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"url": "https://git.kernel.org/stable/c/88942054191185c6f8bea5568cbb5614d1e99af9"
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},
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{
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"url": "https://git.kernel.org/stable/c/490a83d6386eec1d29f470c8d7331677fb46c3b7"
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}
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],
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"title": "bpf, sockmap: Fix self-redirect copied_seq double-counting",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |