CVE-2026-74268

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74268", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.878Z", "datePublished": "2026-08-15T05:57:42.920Z", "dateUpdated": "2026-10-16T18:55:28.993Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-14T11:58:42.864Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: clear sock_ops cb flags before force-closing a child socket\n\nA child socket inherits the listener's bpf_sock_ops_cb_flags via\nsk_clone_lock(). If its setup fails in tcp_v4_syn_recv_sock() /\ntcp_v6_syn_recv_sock(), the child is freed through put_and_exit, where\ninet_csk_prepare_forced_close() drops the socket lock and tcp_done() runs\nwithout it.\n\nIf BPF_SOCK_OPS_STATE_CB_FLAG was inherited, tcp_done() -> tcp_set_state()\ncalls tcp_call_bpf(), which expects the lock and trips sock_owned_by_me():\n\n WARNING: include/net/sock.h:1799 at tcp_set_state+0x433/0x550\n RIP: 0010:tcp_set_state+0x433/0x550 include/net/sock.h:1799\n Call Trace:\n <IRQ>\n tcp_done+0xba/0x250 net/ipv4/tcp.c:5095\n tcp_v4_syn_recv_sock+0x850/0xa50 net/ipv4/tcp_ipv4.c:1787\n tcp_check_req+0xf30/0x1360 net/ipv4/tcp_minisocks.c:926\n tcp_v4_rcv+0x1047/0x1b50 net/ipv4/tcp_ipv4.c:2164\n </IRQ>\n\nThe child is freed before it is ever established, so it should run no\nsock_ops callback. Clear its cb flags in inet_csk_prepare_for_destroy_sock(),\nthe common point for the IPv4, IPv6 and chtls forced-close paths and for the\nMPTCP ->syn_recv_sock() failure path (dispose_child), which reaches tcp_done()\non a child that was never established too."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - Remote attackers reach inet_csk_prepare_for_forced_close() via the standard TCP input path (tcp_v4_rcv/tcp_v6_rcv \u2192 tcp_check_req \u2192 tcp_v4/v6_syn_recv_sock put_and_exit) while processing attacker-sent handshake packets in softirq, with no local access required.\nAC:L - Attackers control handshake completion and can repeatedly force child setup failures\u2014e.g., MPTCP JOIN/sport-mismatch dispose_child paths, ENOMEM under connection pressure in __inet_inherit_port or MD5/AO copy, or chtls setup failure\u2014making put_and_exit reachable without conditions outside their influence.\nPR:N - The receive path is pre-authentication TCP/MPTCP processing; no victim credentials or capabilities are required. Exploitation only needs network reachability to a listener whose admin already attached cgroup BPF sock_ops setting BPF_SOCK_OPS_STATE_CB_FLAG (common on Kubernetes/Cilium/cloud nodes).\nUI:N - No victim interaction is needed beyond normal exposure of a TCP listener; the attacker triggers the bug entirely by sending network packets that complete then fail child socket creation.\nS:U - Vulnerability impact stays within the kernel on the host receiving the traffic; it does not cross VM, container runtime, or IOMMU security boundaries and represents standard in-kernel memory/lock safety impact.\nC:H - Inherited BPF_SOCK_OPS_STATE_CB_FLAG causes tcp_call_bpf() to run on an unlocked, partially torn-down child socket; BPF helpers can read tcp_sock fields without proper locking, enabling unsynchronized kernel memory reads that could disclose sensitive data.\nI:H - tcp_call_bpf() marks is_locked_tcp_sock while the socket lock was dropped, allowing cgroup BPF sock_ops programs to call bpf_setsockopt and modify tcp_sock/kernel state during forced close, creating plausible memory corruption and control-flow compromise primitives.\nA:H - sock_owned_by_me() WARN fires on this path and concurrent BPF access during tcp_done()/inet_csk_destroy_sock() can cause kernel oops or panic; remote attackers can repeatedly trigger the softirq failure path for denial of service on internet-facing BPF-enabled servers."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/tcp.h", "net/ipv4/inet_connection_sock.c"], "versions": [{"version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "5d5389b2c37ca00da61d1407618ebe15abae0c8b", "status": "affected", "versionType": "git"}, {"version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "9f30ba9aa0270a18fdd1e6cd426c480c35f7de9d", "status": "affected", "versionType": "git"}, {"version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "71e9c53220abd7f5a45aa4d5e5b420d3479f3a4f", "status": "affected", "versionType": "git"}, {"version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "9fffa6465851a1910a6e9cb7272787dd615b26b1", "status": "affected", "versionType": "git"}, {"version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "fe23d56e9266d58ba5c380f1970118eedeee0b68", "status": "affected", "versionType": "git"}, {"version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "ce311bd2e36596f0aa2c92ca86fb3e019ac57eae", "status": "affected", "versionType": "git"}, {"version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "8874dafc9099bc49c2e5ebba030f85d276421f92", "status": "affected", "versionType": "git"}, {"version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "990348e5bb457697c2f1f7f7b65154a3334d9d2b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/tcp.h", "net/ipv4/inet_connection_sock.c"], "versions": [{"version": "4.16", "status": "affected"}, {"version": "0", "lessThan": "4.16", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "4.16", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5d5389b2c37ca00da61d1407618ebe15abae0c8b"}, {"url": "https://git.kernel.org/stable/c/9f30ba9aa0270a18fdd1e6cd426c480c35f7de9d"}, {"url": "https://git.kernel.org/stable/c/71e9c53220abd7f5a45aa4d5e5b420d3479f3a4f"}, {"url": "https://git.kernel.org/stable/c/9fffa6465851a1910a6e9cb7272787dd615b26b1"}, {"url": "https://git.kernel.org/stable/c/fe23d56e9266d58ba5c380f1970118eedeee0b68"}, {"url": "https://git.kernel.org/stable/c/ce311bd2e36596f0aa2c92ca86fb3e019ac57eae"}, {"url": "https://git.kernel.org/stable/c/8874dafc9099bc49c2e5ebba030f85d276421f92"}, {"url": "https://git.kernel.org/stable/c/990348e5bb457697c2f1f7f7b65154a3334d9d2b"}], "title": "tcp: clear sock_ops cb flags before force-closing a child socket", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-74268", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T18:51:48.226503Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:55:28.993Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-74268", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T18:51:48.226503Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:51:48.816Z"}}], "cna": {"title": "tcp: clear sock_ops cb flags before force-closing a child socket", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 9.8, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:N - Remote attackers reach inet_csk_prepare_for_forced_close() via the standard TCP input path (tcp_v4_rcv/tcp_v6_rcv \u2192 tcp_check_req \u2192 tcp_v4/v6_syn_recv_sock put_and_exit) while processing attacker-sent handshake packets in softirq, with no local access required.\nAC:L - Attackers control handshake completion and can repeatedly force child setup failures\u2014e.g., MPTCP JOIN/sport-mismatch dispose_child paths, ENOMEM under connection pressure in __inet_inherit_port or MD5/AO copy, or chtls setup failure\u2014making put_and_exit reachable without conditions outside their influence.\nPR:N - The receive path is pre-authentication TCP/MPTCP processing; no victim credentials or capabilities are required. Exploitation only needs network reachability to a listener whose admin already attached cgroup BPF sock_ops setting BPF_SOCK_OPS_STATE_CB_FLAG (common on Kubernetes/Cilium/cloud nodes).\nUI:N - No victim interaction is needed beyond normal exposure of a TCP listener; the attacker triggers the bug entirely by sending network packets that complete then fail child socket creation.\nS:U - Vulnerability impact stays within the kernel on the host receiving the traffic; it does not cross VM, container runtime, or IOMMU security boundaries and represents standard in-kernel memory/lock safety impact.\nC:H - Inherited BPF_SOCK_OPS_STATE_CB_FLAG causes tcp_call_bpf() to run on an unlocked, partially torn-down child socket; BPF helpers can read tcp_sock fields without proper locking, enabling unsynchronized kernel memory reads that could disclose sensitive data.\nI:H - tcp_call_bpf() marks is_locked_tcp_sock while the socket lock was dropped, allowing cgroup BPF sock_ops programs to call bpf_setsockopt and modify tcp_sock/kernel state during forced close, creating plausible memory corruption and control-flow compromise primitives.\nA:H - sock_owned_by_me() WARN fires on this path and concurrent BPF access during tcp_done()/inet_csk_destroy_sock() can cause kernel oops or panic; remote attackers can repeatedly trigger the softirq failure path for denial of service on internet-facing BPF-enabled servers."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "5d5389b2c37ca00da61d1407618ebe15abae0c8b", "versionType": "git"}, {"status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "9f30ba9aa0270a18fdd1e6cd426c480c35f7de9d", "versionType": "git"}, {"status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "71e9c53220abd7f5a45aa4d5e5b420d3479f3a4f", "versionType": "git"}, {"status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "9fffa6465851a1910a6e9cb7272787dd615b26b1", "versionType": "git"}, {"status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "fe23d56e9266d58ba5c380f1970118eedeee0b68", "versionType": "git"}, {"status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "ce311bd2e36596f0aa2c92ca86fb3e019ac57eae", "versionType": "git"}, {"status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "8874dafc9099bc49c2e5ebba030f85d276421f92", "versionType": "git"}, {"status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "lessThan": "990348e5bb457697c2f1f7f7b65154a3334d9d2b", "versionType": "git"}], "programFiles": ["include/net/tcp.h", "net/ipv4/inet_connection_sock.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.16"}, {"status": "unaffected", "version": "0", "lessThan": "4.16", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.270", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.221", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.188", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.157", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.110", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["include/net/tcp.h", "net/ipv4/inet_connection_sock.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/5d5389b2c37ca00da61d1407618ebe15abae0c8b"}, {"url": "https://git.kernel.org/stable/c/9f30ba9aa0270a18fdd1e6cd426c480c35f7de9d"}, {"url": "https://git.kernel.org/stable/c/71e9c53220abd7f5a45aa4d5e5b420d3479f3a4f"}, {"url": "https://git.kernel.org/stable/c/9fffa6465851a1910a6e9cb7272787dd615b26b1"}, {"url": "https://git.kernel.org/stable/c/fe23d56e9266d58ba5c380f1970118eedeee0b68"}, {"url": "https://git.kernel.org/stable/c/ce311bd2e36596f0aa2c92ca86fb3e019ac57eae"}, {"url": "https://git.kernel.org/stable/c/8874dafc9099bc49c2e5ebba030f85d276421f92"}, {"url": "https://git.kernel.org/stable/c/990348e5bb457697c2f1f7f7b65154a3334d9d2b"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: clear sock_ops cb flags before force-closing a child socket\n\nA child socket inherits the listener's bpf_sock_ops_cb_flags via\nsk_clone_lock(). If its setup fails in tcp_v4_syn_recv_sock() /\ntcp_v6_syn_recv_sock(), the child is freed through put_and_exit, where\ninet_csk_prepare_forced_close() drops the socket lock and tcp_done() runs\nwithout it.\n\nIf BPF_SOCK_OPS_STATE_CB_FLAG was inherited, tcp_done() -> tcp_set_state()\ncalls tcp_call_bpf(), which expects the lock and trips sock_owned_by_me():\n\n WARNING: include/net/sock.h:1799 at tcp_set_state+0x433/0x550\n RIP: 0010:tcp_set_state+0x433/0x550 include/net/sock.h:1799\n Call Trace:\n <IRQ>\n tcp_done+0xba/0x250 net/ipv4/tcp.c:5095\n tcp_v4_syn_recv_sock+0x850/0xa50 net/ipv4/tcp_ipv4.c:1787\n tcp_check_req+0xf30/0x1360 net/ipv4/tcp_minisocks.c:926\n tcp_v4_rcv+0x1047/0x1b50 net/ipv4/tcp_ipv4.c:2164\n </IRQ>\n\nThe child is freed before it is ever established, so it should run no\nsock_ops callback. Clear its cb flags in inet_csk_prepare_for_destroy_sock(),\nthe common point for the IPv4, IPv6 and chtls forced-close paths and for the\nMPTCP ->syn_recv_sock() failure path (dispose_child), which reaches tcp_done()\non a child that was never established too."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.270", "versionStartIncluding": "4.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.221", "versionStartIncluding": "4.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.188", "versionStartIncluding": "4.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.157", "versionStartIncluding": "4.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.110", "versionStartIncluding": "4.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.40", "versionStartIncluding": "4.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.5", "versionStartIncluding": "4.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "4.16"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-14T11:58:42.864Z"}}}, "cveMetadata": {"cveId": "CVE-2026-74268", "state": "PUBLISHED", "dateUpdated": "2026-10-16T18:55:28.993Z", "dateReserved": "2026-08-15T05:44:03.878Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T05:57:42.920Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["include/net/tcp.h", "net/ipv4/inet_connection_sock.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "5d5389b2c37ca00da61d1407618ebe15abae0c8b", "status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "versionType": "git"}, {"lessThan": "9f30ba9aa0270a18fdd1e6cd426c480c35f7de9d", "status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "versionType": "git"}, {"lessThan": "71e9c53220abd7f5a45aa4d5e5b420d3479f3a4f", "status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "versionType": "git"}, {"lessThan": "9fffa6465851a1910a6e9cb7272787dd615b26b1", "status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "versionType": "git"}, {"lessThan": "fe23d56e9266d58ba5c380f1970118eedeee0b68", "status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "versionType": "git"}, {"lessThan": "ce311bd2e36596f0aa2c92ca86fb3e019ac57eae", "status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "versionType": "git"}, {"lessThan": "8874dafc9099bc49c2e5ebba030f85d276421f92", "status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "versionType": "git"}, {"lessThan": "990348e5bb457697c2f1f7f7b65154a3334d9d2b", "status": "affected", "version": "d44874910a26f3a8f81edf873a2473363f07f660", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["include/net/tcp.h", "net/ipv4/inet_connection_sock.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.16"}, {"lessThan": "4.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\ntcp: clear sock_ops cb flags before force-closing a child socket\n\nA child socket inherits the listener's bpf_sock_ops_cb_flags via\nsk_clone_lock(). If its setup fails in tcp_v4_syn_recv_sock() /\ntcp_v6_syn_recv_sock(), the child is freed through put_and_exit, where\ninet_csk_prepare_forced_close() drops the socket lock and tcp_done() runs\nwithout it.\n\nIf BPF_SOCK_OPS_STATE_CB_FLAG was inherited, tcp_done() -> tcp_set_state()\ncalls tcp_call_bpf(), which expects the lock and trips sock_owned_by_me():\n\n WARNING: include/net/sock.h:1799 at tcp_set_state+0x433/0x550\n RIP: 0010:tcp_set_state+0x433/0x550 include/net/sock.h:1799\n Call Trace:\n <IRQ>\n tcp_done+0xba/0x250 net/ipv4/tcp.c:5095\n tcp_v4_syn_recv_sock+0x850/0xa50 net/ipv4/tcp_ipv4.c:1787\n tcp_check_req+0xf30/0x1360 net/ipv4/tcp_minisocks.c:926\n tcp_v4_rcv+0x1047/0x1b50 net/ipv4/tcp_ipv4.c:2164\n </IRQ>\n\nThe child is freed before it is ever established, so it should run no\nsock_ops callback. Clear its cb flags in inet_csk_prepare_for_destroy_sock(),\nthe common point for the IPv4, IPv6 and chtls forced-close paths and for the\nMPTCP ->syn_recv_sock() failure path (dispose_child), which reaches tcp_done()\non a child that was never established too."}], "id": "CVE-2026-74268", "lastModified": "2026-10-16T19:17:35.287", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-74268", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T18:51:48.226503Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:22:26.183", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5d5389b2c37ca00da61d1407618ebe15abae0c8b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/71e9c53220abd7f5a45aa4d5e5b420d3479f3a4f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8874dafc9099bc49c2e5ebba030f85d276421f92"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/990348e5bb457697c2f1f7f7b65154a3334d9d2b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9f30ba9aa0270a18fdd1e6cd426c480c35f7de9d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9fffa6465851a1910a6e9cb7272787dd615b26b1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ce311bd2e36596f0aa2c92ca86fb3e019ac57eae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fe23d56e9266d58ba5c380f1970118eedeee0b68"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d44874910a26f3a8f81edf873a2473363f07f660,ce311bd2e36596f0aa2c92ca86fb3e019ac57eae)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d44874910a26f3a8f81edf873a2473363f07f660,8874dafc9099bc49c2e5ebba030f85d276421f92)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d44874910a26f3a8f81edf873a2473363f07f660,990348e5bb457697c2f1f7f7b65154a3334d9d2b)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "4.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T12:00:05.302135+00:00", "updated": "2026-08-17T09:45:06.226346+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362"]}