CVE-2026-46015

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46015", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.092Z", "datePublished": "2026-05-27T12:56:17.249Z", "dateUpdated": "2026-11-10T12:46:53.275Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:29:10.115Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: call sk_data_ready() after listener migration\n\nWhen inet_csk_listen_stop() migrates an established child socket from\na closing listener to another socket in the same SO_REUSEPORT group,\nthe target listener gets a new accept-queue entry via\ninet_csk_reqsk_queue_add(), but that path never notifies the target\nlistener's waiters. A nonblocking accept() still works because it\nchecks the queue directly, but poll()/epoll_wait() waiters and\nblocking accept() callers can also remain asleep indefinitely.\n\nCall READ_ONCE(nsk->sk_data_ready)(nsk) after a successful migration\nin inet_csk_listen_stop().\n\nHowever, after inet_csk_reqsk_queue_add() succeeds, the ref acquired\nin reuseport_migrate_sock() is effectively transferred to\nnreq->rsk_listener. Another CPU can then dequeue nreq via accept()\nor listener shutdown, hit reqsk_put(), and drop that listener ref.\nSince listeners are SOCK_RCU_FREE, wrap the post-queue_add()\ndereferences of nsk in rcu_read_lock()/rcu_read_unlock(), which also\ncovers the existing sock_net(nsk) access in that path.\n\nThe reqsk_timer_handler() path does not need the same changes for two\nreasons: half-open requests become readable only after the final ACK,\nwhere tcp_child_process() already wakes the listener; and once nreq is\nvisible via inet_ehash_insert(), the success path no longer touches\nnsk directly."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is reached only through local socket lifecycle operations \u2014 creating an SO_REUSEPORT group, enabling migration, and closing the source listener while accepting/closing the target. A remote peer cannot set up the migration group or drive the race, so the vector is Local.\nAC:L - The attacker controls both sides of the race (the closing listener via inet_csk_listen_stop and the concurrent accept/close that drops the listener's last ref), and the missed-wakeup half is deterministic; per guidance an attacker-created race is Low.\nPR:L - Migration must be enabled, requiring CAP_NET_ADMIN to set the per-netns net.ipv4.tcp_migrate_req sysctl (or a SK_REUSEPORT/migrate BPF prog), all of which an unprivileged user obtains in a user namespace via unshare -Urn.\nUI:N - Triggering depends only on the attacker's own socket operations; no action by any other user is required.\nS:U - The use-after-free and its impact are confined to the kernel's own memory/security authority with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - Use-after-free of a SOCK_RCU_FREE listener socket lets reallocated/freed memory be read (e.g., via sock_net(nsk)), enabling kernel information disclosure.\nI:H - The freed socket is dereferenced for sock_net(nsk) in __NET_INC_STATS (a pointer-controlled increment) and sk_data_ready(nsk) (a function-pointer call), giving an attacker-influenced write/control-flow primitive after heap grooming.\nA:H - The use-after-free reliably crashes the kernel, and the always-present missed wakeup hangs a listener's accept/poll/epoll waiters indefinitely."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/inet_connection_sock.c"], "versions": [{"version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "lessThan": "7aa7933a5607b1e5b56f322d17265c1d0ea02c51", "status": "affected", "versionType": "git"}, {"version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "lessThan": "14e9bb6eba8f59dcc637702e4744ae5e30660d76", "status": "affected", "versionType": "git"}, {"version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "lessThan": "ab5fdcd535645f6dbe6e9e21d96a08d141e88b4b", "status": "affected", "versionType": "git"}, {"version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "lessThan": "bebd058ef40c67a81fe6d9ee8beaa4ede90e0704", "status": "affected", "versionType": "git"}, {"version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "lessThan": "83bb57635d7cbafde32f865b577ecfd969f02337", "status": "affected", "versionType": "git"}, {"version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "lessThan": "12625b4da84caf4d84a04988710a7b9bcf702b18", "status": "affected", "versionType": "git"}, {"version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "lessThan": "3864c6ba1e041bc75342353a70fa2a2c6f909923", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/inet_connection_sock.c"], "versions": [{"version": "5.14", "status": "affected"}, {"version": "0", "lessThan": "5.14", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.86", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "5.14", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.12.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "6.18.27"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "7.0.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/7aa7933a5607b1e5b56f322d17265c1d0ea02c51"}, {"url": "https://git.kernel.org/stable/c/14e9bb6eba8f59dcc637702e4744ae5e30660d76"}, {"url": "https://git.kernel.org/stable/c/ab5fdcd535645f6dbe6e9e21d96a08d141e88b4b"}, {"url": "https://git.kernel.org/stable/c/bebd058ef40c67a81fe6d9ee8beaa4ede90e0704"}, {"url": "https://git.kernel.org/stable/c/83bb57635d7cbafde32f865b577ecfd969f02337"}, {"url": "https://git.kernel.org/stable/c/12625b4da84caf4d84a04988710a7b9bcf702b18"}, {"url": "https://git.kernel.org/stable/c/3864c6ba1e041bc75342353a70fa2a2c6f909923"}], "title": "tcp: call sk_data_ready() after listener migration", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"x_adpType": "supplier", "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-11-10T12:46:53.275Z"}, "affected": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": 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A remote peer cannot set up the migration group or drive the race, so the vector is Local.\nAC:L - The attacker controls both sides of the race (the closing listener via inet_csk_listen_stop and the concurrent accept/close that drops the listener's last ref), and the missed-wakeup half is deterministic; per guidance an attacker-created race is Low.\nPR:L - Migration must be enabled, requiring CAP_NET_ADMIN to set the per-netns net.ipv4.tcp_migrate_req sysctl (or a SK_REUSEPORT/migrate BPF prog), all of which an unprivileged user obtains in a user namespace via unshare -Urn.\nUI:N - Triggering depends only on the attacker's own socket operations; no action by any other user is required.\nS:U - The use-after-free and its impact are confined to the kernel's own memory/security authority with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - Use-after-free of a SOCK_RCU_FREE listener socket lets reallocated/freed memory be read (e.g., via sock_net(nsk)), enabling kernel information disclosure.\nI:H - The freed socket is dereferenced for sock_net(nsk) in __NET_INC_STATS (a pointer-controlled increment) and sk_data_ready(nsk) (a function-pointer call), giving an attacker-influenced write/control-flow primitive after heap grooming.\nA:H - The use-after-free reliably crashes the kernel, and the always-present missed wakeup hangs a listener's accept/poll/epoll waiters indefinitely."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "lessThan": "7aa7933a5607b1e5b56f322d17265c1d0ea02c51", "versionType": "git"}, {"status": "affected", "version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "lessThan": "14e9bb6eba8f59dcc637702e4744ae5e30660d76", "versionType": "git"}, {"status": "affected", "version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "lessThan": "ab5fdcd535645f6dbe6e9e21d96a08d141e88b4b", "versionType": "git"}, {"status": "affected", "version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "lessThan": "bebd058ef40c67a81fe6d9ee8beaa4ede90e0704", "versionType": "git"}, {"status": "affected", "version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "lessThan": "83bb57635d7cbafde32f865b577ecfd969f02337", "versionType": "git"}, {"status": "affected", "version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "lessThan": "12625b4da84caf4d84a04988710a7b9bcf702b18", "versionType": "git"}, {"status": "affected", "version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "lessThan": "3864c6ba1e041bc75342353a70fa2a2c6f909923", "versionType": "git"}], "programFiles": ["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": "5.14"}, {"status": "unaffected", "version": "0", "lessThan": "5.14", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.209", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.175", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.140", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.86", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.27", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.4", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/ipv4/inet_connection_sock.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/7aa7933a5607b1e5b56f322d17265c1d0ea02c51"}, {"url": "https://git.kernel.org/stable/c/14e9bb6eba8f59dcc637702e4744ae5e30660d76"}, {"url": "https://git.kernel.org/stable/c/ab5fdcd535645f6dbe6e9e21d96a08d141e88b4b"}, {"url": "https://git.kernel.org/stable/c/bebd058ef40c67a81fe6d9ee8beaa4ede90e0704"}, {"url": "https://git.kernel.org/stable/c/83bb57635d7cbafde32f865b577ecfd969f02337"}, {"url": "https://git.kernel.org/stable/c/12625b4da84caf4d84a04988710a7b9bcf702b18"}, {"url": "https://git.kernel.org/stable/c/3864c6ba1e041bc75342353a70fa2a2c6f909923"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: call sk_data_ready() after listener migration\n\nWhen inet_csk_listen_stop() migrates an established child socket from\na closing listener to another socket in the same SO_REUSEPORT group,\nthe target listener gets a new accept-queue entry via\ninet_csk_reqsk_queue_add(), but that path never notifies the target\nlistener's waiters. A nonblocking accept() still works because it\nchecks the queue directly, but poll()/epoll_wait() waiters and\nblocking accept() callers can also remain asleep indefinitely.\n\nCall READ_ONCE(nsk->sk_data_ready)(nsk) after a successful migration\nin inet_csk_listen_stop().\n\nHowever, after inet_csk_reqsk_queue_add() succeeds, the ref acquired\nin reuseport_migrate_sock() is effectively transferred to\nnreq->rsk_listener. Another CPU can then dequeue nreq via accept()\nor listener shutdown, hit reqsk_put(), and drop that listener ref.\nSince listeners are SOCK_RCU_FREE, wrap the post-queue_add()\ndereferences of nsk in rcu_read_lock()/rcu_read_unlock(), which also\ncovers the existing sock_net(nsk) access in that path.\n\nThe reqsk_timer_handler() path does not need the same changes for two\nreasons: half-open requests become readable only after the final ACK,\nwhere tcp_child_process() already wakes the listener; and once nreq is\nvisible via inet_ehash_insert(), the success path no longer touches\nnsk directly."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.209", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.175", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.140", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.86", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.27", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.4", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "5.14"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:29:10.115Z"}}}, "cveMetadata": {"cveId": "CVE-2026-46015", "state": "PUBLISHED", "dateUpdated": "2026-11-10T12:46:53.275Z", "dateReserved": "2026-05-13T15:03:33.092Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-05-27T12:56:17.249Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ipv4/inet_connection_sock.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "7aa7933a5607b1e5b56f322d17265c1d0ea02c51", "status": "affected", "version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "versionType": "git"}, {"lessThan": "14e9bb6eba8f59dcc637702e4744ae5e30660d76", "status": "affected", "version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "versionType": "git"}, {"lessThan": "ab5fdcd535645f6dbe6e9e21d96a08d141e88b4b", "status": "affected", "version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "versionType": "git"}, {"lessThan": "bebd058ef40c67a81fe6d9ee8beaa4ede90e0704", "status": "affected", "version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "versionType": "git"}, {"lessThan": "83bb57635d7cbafde32f865b577ecfd969f02337", "status": "affected", "version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "versionType": "git"}, {"lessThan": "12625b4da84caf4d84a04988710a7b9bcf702b18", "status": "affected", "version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "versionType": "git"}, {"lessThan": "3864c6ba1e041bc75342353a70fa2a2c6f909923", "status": "affected", "version": "54b92e84193749c9968aff2dd46e3b0f42643e18", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["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": "5.14"}, {"lessThan": "5.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.209", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.175", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.140", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.86", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.27", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"affectedData": [{"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}], "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5DBAE898-A62B-4CA9-AD9A-DFE3A3675854", "versionEndExcluding": "5.15.209", "versionStartIncluding": "5.14", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "92385813-D91D-480D-83A1-F423D2CBB2BA", "versionEndExcluding": "6.1.175", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A1A92866-F406-43B5-B2D1-CFC274753E9D", "versionEndExcluding": "6.6.140", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "55DA1C62-9991-451E-B8A8-E0004E00F789", "versionEndExcluding": "6.12.86", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A10AC84F-C058-47D5-85B4-E6E51A613B74", "versionEndExcluding": "6.18.27", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CDB78D6D-22C3-4154-B0D0-94AF1CE5C2E3", "versionEndExcluding": "7.0.4", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: call sk_data_ready() after listener migration\n\nWhen inet_csk_listen_stop() migrates an established child socket from\na closing listener to another socket in the same SO_REUSEPORT group,\nthe target listener gets a new accept-queue entry via\ninet_csk_reqsk_queue_add(), but that path never notifies the target\nlistener's waiters. A nonblocking accept() still works because it\nchecks the queue directly, but poll()/epoll_wait() waiters and\nblocking accept() callers can also remain asleep indefinitely.\n\nCall READ_ONCE(nsk->sk_data_ready)(nsk) after a successful migration\nin inet_csk_listen_stop().\n\nHowever, after inet_csk_reqsk_queue_add() succeeds, the ref acquired\nin reuseport_migrate_sock() is effectively transferred to\nnreq->rsk_listener. Another CPU can then dequeue nreq via accept()\nor listener shutdown, hit reqsk_put(), and drop that listener ref.\nSince listeners are SOCK_RCU_FREE, wrap the post-queue_add()\ndereferences of nsk in rcu_read_lock()/rcu_read_unlock(), which also\ncovers the existing sock_net(nsk) access in that path.\n\nThe reqsk_timer_handler() path does not need the same changes for two\nreasons: half-open requests become readable only after the final ACK,\nwhere tcp_child_process() already wakes the listener; and once nreq is\nvisible via inet_ehash_insert(), the success path no longer touches\nnsk directly."}], "id": "CVE-2026-46015", "lastModified": "2026-11-10T13:19:13.600", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-46015", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:18:52.666086Z", "version": "2.0.3"}}]}, "published": "2026-05-27T14:17:19.840", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/12625b4da84caf4d84a04988710a7b9bcf702b18"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/14e9bb6eba8f59dcc637702e4744ae5e30660d76"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3864c6ba1e041bc75342353a70fa2a2c6f909923"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7aa7933a5607b1e5b56f322d17265c1d0ea02c51"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/83bb57635d7cbafde32f865b577ecfd969f02337"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ab5fdcd535645f6dbe6e9e21d96a08d141e88b4b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bebd058ef40c67a81fe6d9ee8beaa4ede90e0704"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-408"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: tcp: call sk_data_ready() after listener migration", "id": "2481936", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481936"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-821", "details": ["A flaw was found in the Linux kernel's TCP networking subsystem. When an established network connection is migrated between listener sockets within the same SO_REUSEPORT group, applications waiting for new connections may not be properly notified. This can cause poll(), epoll_wait(), and blocking accept() calls to remain unresponsive indefinitely, leading to a Denial of Service (DoS) for affected applications."], "name": "CVE-2026-46015", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46015\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46015\nhttps://lore.kernel.org/linux-cve-announce/2026052745-CVE-2026-46015-796a@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[54b92e84193749c9968aff2dd46e3b0f42643e18,ab5fdcd535645f6dbe6e9e21d96a08d141e88b4b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[54b92e84193749c9968aff2dd46e3b0f42643e18,bebd058ef40c67a81fe6d9ee8beaa4ede90e0704)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[54b92e84193749c9968aff2dd46e3b0f42643e18,83bb57635d7cbafde32f865b577ecfd969f02337)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[54b92e84193749c9968aff2dd46e3b0f42643e18,12625b4da84caf4d84a04988710a7b9bcf702b18)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[54b92e84193749c9968aff2dd46e3b0f42643e18,3864c6ba1e041bc75342353a70fa2a2c6f909923)"}}], "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": "5.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.140,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.86,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.27,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.4,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-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": "2026-05-27T17:00:17.657558+00:00", "updated": "2026-10-23T01:15:14.060519+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}