CVE-2026-98925

{"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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/core/skmsg.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "cf9aefb26a071cb8b6fdd761c27e022a1184946d", "status": "affected", "version": "fe735073a50eaa71aceb2e990827fe26f33cddd6", "versionType": "git"}, {"lessThan": "dc98def81e3c629e25fcdd5753b1db93aab27ce9", "status": "affected", "version": "e5c6de5fa025882babf89cecbed80acf49b987fa", "versionType": "git"}, {"lessThan": "ef6f2182fee6b9721c005ccfc6aec0a47f79bbfa", "status": "affected", "version": "e5c6de5fa025882babf89cecbed80acf49b987fa", "versionType": "git"}, {"lessThan": "ae1ffd04e98beefbe5d83335d506b0bcd5c2a6b3", "status": "affected", "version": "e5c6de5fa025882babf89cecbed80acf49b987fa", "versionType": "git"}, {"lessThan": "88942054191185c6f8bea5568cbb5614d1e99af9", "status": "affected", "version": "e5c6de5fa025882babf89cecbed80acf49b987fa", "versionType": "git"}, {"lessThan": "490a83d6386eec1d29f470c8d7331677fb46c3b7", "status": "affected", "version": "e5c6de5fa025882babf89cecbed80acf49b987fa", "versionType": "git"}, {"status": "affected", "version": "f9b4a0b537be7a6e5f002ca64b09dcca9c14e6ed", "versionType": "git"}, {"lessThan": "6.1.189", "status": "affected", "version": "6.1.32", "versionType": "semver"}, {"lessThan": "6.4", "status": "affected", "version": "6.3.6", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/core/skmsg.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"lessThan": "6.4", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.55", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-98925", "lastModified": "2026-10-23T13:17:13.210", "metrics": {}, "published": "2026-10-23T13:17:13.210", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/490a83d6386eec1d29f470c8d7331677fb46c3b7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/88942054191185c6f8bea5568cbb5614d1e99af9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ae1ffd04e98beefbe5d83335d506b0bcd5c2a6b3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cf9aefb26a071cb8b6fdd761c27e022a1184946d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dc98def81e3c629e25fcdd5753b1db93aab27ce9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ef6f2182fee6b9721c005ccfc6aec0a47f79bbfa"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: bpf, sockmap: Fix self-redirect copied_seq double-counting", "id": "2559682", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559682"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-617", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf, sockmap: Fix self-redirect copied_seq double-counting\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:\nTCP recvmsg seq # bug 2: copied BF2E806, seq BF2E7FD, \\\nrcvnxt BF2E806, fl 0\nWARNING: net/ipv4/tcp.c:2745 at tcp_recvmsg_locked+0x72b/0x2640\nCall Trace:\ntcp_recvmsg+0x10a/0x500\nsock_recvmsg+0x168/0x1d0\n__sys_recvfrom+0x19a/0x2a0\n__x64_sys_recvfrom+0xe4/0x1f0\ndo_syscall_64+0xf7/0x530\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\ncleanup rbuf bug: copied BF2E806 seq BF2E806 rcvnxt BF2E806\nWARNING: net/ipv4/tcp.c:1609 at tcp_cleanup_rbuf+0xf2/0x1c0\nCall Trace:\ntcp_recvmsg_locked+0x8d1/0x2640\ntcp_recvmsg+0x10a/0x500\nsock_recvmsg+0x168/0x1d0\n__sys_recvfrom+0x19a/0x2a0\n__x64_sys_recvfrom+0xe4/0x1f0\ndo_syscall_64+0xf7/0x530\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\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.", "A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) sockmap subsystem. This flaw allows a local attacker to cause a Denial of Service (DoS) when redirecting network traffic back to the originating socket. The kernel improperly double-counts sequence numbers for received TCP (Transmission Control Protocol) data, resulting in internal state inconsistencies and kernel warnings. Consequently, normal socket communication is disrupted, which may lead to system instability."], "name": "CVE-2026-98925", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98925\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98925\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98925.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fe735073a50eaa71aceb2e990827fe26f33cddd6,cf9aefb26a071cb8b6fdd761c27e022a1184946d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e5c6de5fa025882babf89cecbed80acf49b987fa,dc98def81e3c629e25fcdd5753b1db93aab27ce9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e5c6de5fa025882babf89cecbed80acf49b987fa,ef6f2182fee6b9721c005ccfc6aec0a47f79bbfa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e5c6de5fa025882babf89cecbed80acf49b987fa,ae1ffd04e98beefbe5d83335d506b0bcd5c2a6b3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e5c6de5fa025882babf89cecbed80acf49b987fa,88942054191185c6f8bea5568cbb5614d1e99af9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e5c6de5fa025882babf89cecbed80acf49b987fa,490a83d6386eec1d29f470c8d7331677fb46c3b7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "f9b4a0b537be7a6e5f002ca64b09dcca9c14e6ed"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.1.32,6.1.189)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.3.6,6.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.4"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.4)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.189,6.2.0)"}}, {"platform": 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