CVE-2026-74715

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Repeating the unmatched put\ncan destroy a live namespace and crash later users.\n\nThe kernel reported:\n\n Oops: general protection fault, probably for non-canonical address\n KASAN: null-ptr-deref in range [0x00000000000000e8-0x00000000000000ef]\n RIP: 0010:bpf_prog_test_run_xdp+0x52c/0x1700\n Call Trace:\n __sys_bpf+0x1662/0x50c0\n __x64_sys_bpf+0x73/0xb0\n do_syscall_64+0xf9/0x540\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n Kernel panic - not syncing: Fatal exception\n\nSnapshot every input field of opts with READ_ONCE() before validating or\nusing it. The netns_id snapshot keeps the namespace get/put pair\nbalanced, while the other snapshots keep the remaining options from\nchanging partway through an invocation. The individual reads can still\nobserve an inconsistent combination during a concurrent update, but each\nselected field value remains stable for that invocation."}], "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 in BPF conntrack kfuncs reached only via the bpf() syscall (load, BPF_PROG_TEST_RUN, or attached XDP/TC programs), not from remote packet handling alone; kernel guidance classifies BPF as Local.\nAC:L - Exploitation needs a race on opts->netns_id in a shared BPF map value, but the attacker authors the program, drives concurrent bpf_map_update_elem and kfunc calls, and can pin threads to different CPUs to win the race reliably.\nPR:L - Triggering bpf_xdp_ct_lookup/bpf_skb_ct_lookup requires loading XDP or TC-BPF programs, which needs CAP_BPF and CAP_NET_ADMIN; both are obtainable by an unprivileged user inside a user/network namespace via unshare.\nUI:N - No victim interaction is required; the attacker loads their own BPF program, supplies map-backed opts, and runs concurrent test-run or traffic to trigger the refcount imbalance themselves.\nS:U - Impact is premature destruction of a live network namespace and kernel crashes within the same kernel security domain; it does not cross a VM, container-to-host, or IOMMU boundary.\nC:H - Repeated unmatched put_net() can drop a live namespace refcount to zero and free it while still in use, creating a net-namespace use-after-free that can expose freed kernel memory and enable information disclosure.\nI:H - The refcount corruption can destroy active network namespaces and corrupt kernel networking state; such lifetime bugs are memory corruption primitives that can be leveraged for arbitrary kernel modification or control-flow hijacking.\nA:H - The fix commit documents a reproduced general protection fault and kernel panic in bpf_prog_test_run_xdp from a null-ptr-deref after the namespace is destroyed, confirming complete system availability loss."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/nf_conntrack_bpf.c"], "versions": [{"version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "lessThan": "cfde990193135a35637e55f69e83e4ab441e60ab", "status": "affected", "versionType": "git"}, {"version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "lessThan": "fb22bedf0c4f4f05bfa6e4a7ec0fd97bbdff9ce8", "status": "affected", "versionType": "git"}, {"version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "lessThan": "41731d4290400cb898f15f049ae4018d45415e69", "status": "affected", "versionType": "git"}, {"version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "lessThan": "4af94462c0ca2187a02a1a6641020ae888c74d5c", "status": "affected", "versionType": "git"}, {"version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "lessThan": "e5e060eb63d10b41ab60fd955649479d99b38210", "status": "affected", "versionType": "git"}, {"version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "lessThan": "fdeba03fea78407a8c52faa99177c9f7f29f90eb", "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/netfilter/nf_conntrack_bpf.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.9", "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": "6.0", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.1.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/cfde990193135a35637e55f69e83e4ab441e60ab"}, {"url": "https://git.kernel.org/stable/c/fb22bedf0c4f4f05bfa6e4a7ec0fd97bbdff9ce8"}, {"url": "https://git.kernel.org/stable/c/41731d4290400cb898f15f049ae4018d45415e69"}, {"url": "https://git.kernel.org/stable/c/4af94462c0ca2187a02a1a6641020ae888c74d5c"}, {"url": "https://git.kernel.org/stable/c/e5e060eb63d10b41ab60fd955649479d99b38210"}, {"url": "https://git.kernel.org/stable/c/fdeba03fea78407a8c52faa99177c9f7f29f90eb"}], "title": "bpf: Fix netns reference imbalance in conntrack kfuncs", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-74715", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T19:15:29.946901Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:16:11.506Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-74715", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T19:15:29.946901Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:15:30.928Z"}}], "cna": {"title": "bpf: Fix netns reference imbalance in conntrack kfuncs", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is in BPF conntrack kfuncs reached only via the bpf() syscall (load, BPF_PROG_TEST_RUN, or attached XDP/TC programs), not from remote packet handling alone; kernel guidance classifies BPF as Local.\nAC:L - Exploitation needs a race on opts->netns_id in a shared BPF map value, but the attacker authors the program, drives concurrent bpf_map_update_elem and kfunc calls, and can pin threads to different CPUs to win the race reliably.\nPR:L - Triggering bpf_xdp_ct_lookup/bpf_skb_ct_lookup requires loading XDP or TC-BPF programs, which needs CAP_BPF and CAP_NET_ADMIN; both are obtainable by an unprivileged user inside a user/network namespace via unshare.\nUI:N - No victim interaction is required; the attacker loads their own BPF program, supplies map-backed opts, and runs concurrent test-run or traffic to trigger the refcount imbalance themselves.\nS:U - Impact is premature destruction of a live network namespace and kernel crashes within the same kernel security domain; it does not cross a VM, container-to-host, or IOMMU boundary.\nC:H - Repeated unmatched put_net() can drop a live namespace refcount to zero and free it while still in use, creating a net-namespace use-after-free that can expose freed kernel memory and enable information disclosure.\nI:H - The refcount corruption can destroy active network namespaces and corrupt kernel networking state; such lifetime bugs are memory corruption primitives that can be leveraged for arbitrary kernel modification or control-flow hijacking.\nA:H - The fix commit documents a reproduced general protection fault and kernel panic in bpf_prog_test_run_xdp from a null-ptr-deref after the namespace is destroyed, confirming complete system availability loss."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "lessThan": "fb22bedf0c4f4f05bfa6e4a7ec0fd97bbdff9ce8", "versionType": "git"}, {"status": "affected", "version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "lessThan": "41731d4290400cb898f15f049ae4018d45415e69", "versionType": "git"}, {"status": "affected", "version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "lessThan": "4af94462c0ca2187a02a1a6641020ae888c74d5c", "versionType": "git"}, {"status": "affected", "version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "lessThan": "e5e060eb63d10b41ab60fd955649479d99b38210", "versionType": "git"}, {"status": "affected", "version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "lessThan": "fdeba03fea78407a8c52faa99177c9f7f29f90eb", "versionType": "git"}], "programFiles": ["net/netfilter/nf_conntrack_bpf.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"status": "unaffected", "version": "0", "lessThan": "6.0", "versionType": "semver"}, {"status": "unaffected", "version": "6.6.160", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.114", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.57", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.9", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/netfilter/nf_conntrack_bpf.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/fb22bedf0c4f4f05bfa6e4a7ec0fd97bbdff9ce8"}, {"url": "https://git.kernel.org/stable/c/41731d4290400cb898f15f049ae4018d45415e69"}, {"url": "https://git.kernel.org/stable/c/4af94462c0ca2187a02a1a6641020ae888c74d5c"}, {"url": "https://git.kernel.org/stable/c/e5e060eb63d10b41ab60fd955649479d99b38210"}, {"url": "https://git.kernel.org/stable/c/fdeba03fea78407a8c52faa99177c9f7f29f90eb"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix netns reference imbalance in conntrack kfuncs\n\nThe opts argument of the BPF conntrack kfuncs can point to a shared\nmap value. __bpf_nf_ct_lookup() and __bpf_nf_ct_alloc_entry() read\nopts->netns_id separately when acquiring and releasing the network\nnamespace reference.\n\nThe reference imbalance can occur as follows:\n\n CPU 0 CPU 1\n read opts->netns_id (-1)\n skip get_net_ns_by_id()\n write opts->netns_id (id)\n read opts->netns_id (id)\n put_net(net) /* no matching get */\n\nThe reverse transition leaks the reference. Repeating the unmatched put\ncan destroy a live namespace and crash later users.\n\nThe kernel reported:\n\n Oops: general protection fault, probably for non-canonical address\n KASAN: null-ptr-deref in range [0x00000000000000e8-0x00000000000000ef]\n RIP: 0010:bpf_prog_test_run_xdp+0x52c/0x1700\n Call Trace:\n __sys_bpf+0x1662/0x50c0\n __x64_sys_bpf+0x73/0xb0\n do_syscall_64+0xf9/0x540\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n Kernel panic - not syncing: Fatal exception\n\nSnapshot every input field of opts with READ_ONCE() before validating or\nusing it. The netns_id snapshot keeps the namespace get/put pair\nbalanced, while the other snapshots keep the remaining options from\nchanging partway through an invocation. The individual reads can still\nobserve an inconsistent combination during a concurrent update, but each\nselected field value remains stable for that invocation."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.160", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.114", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.57", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.9", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "6.0"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:46:15.080Z"}}}, "cveMetadata": {"cveId": "CVE-2026-74715", "state": "PUBLISHED", "dateUpdated": "2026-10-21T12:46:15.080Z", "dateReserved": "2026-08-15T05:44:03.928Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-22T15:33:10.262Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/netfilter/nf_conntrack_bpf.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "cfde990193135a35637e55f69e83e4ab441e60ab", "status": "affected", "version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "versionType": "git"}, {"lessThan": "fb22bedf0c4f4f05bfa6e4a7ec0fd97bbdff9ce8", "status": "affected", "version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "versionType": "git"}, {"lessThan": "41731d4290400cb898f15f049ae4018d45415e69", "status": "affected", "version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "versionType": "git"}, {"lessThan": "4af94462c0ca2187a02a1a6641020ae888c74d5c", "status": "affected", "version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "versionType": "git"}, {"lessThan": "e5e060eb63d10b41ab60fd955649479d99b38210", "status": "affected", "version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "versionType": "git"}, {"lessThan": "fdeba03fea78407a8c52faa99177c9f7f29f90eb", "status": "affected", "version": "aed8ee7feb44b6537af1e0b4f03365d42928be38", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/netfilter/nf_conntrack_bpf.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"lessThan": "6.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.9", "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\nbpf: Fix netns reference imbalance in conntrack kfuncs\n\nThe opts argument of the BPF conntrack kfuncs can point to a shared\nmap value. __bpf_nf_ct_lookup() and __bpf_nf_ct_alloc_entry() read\nopts->netns_id separately when acquiring and releasing the network\nnamespace reference.\n\nThe reference imbalance can occur as follows:\n\n CPU 0 CPU 1\n read opts->netns_id (-1)\n skip get_net_ns_by_id()\n write opts->netns_id (id)\n read opts->netns_id (id)\n put_net(net) /* no matching get */\n\nThe reverse transition leaks the reference. Repeating the unmatched put\ncan destroy a live namespace and crash later users.\n\nThe kernel reported:\n\n Oops: general protection fault, probably for non-canonical address\n KASAN: null-ptr-deref in range [0x00000000000000e8-0x00000000000000ef]\n RIP: 0010:bpf_prog_test_run_xdp+0x52c/0x1700\n Call Trace:\n __sys_bpf+0x1662/0x50c0\n __x64_sys_bpf+0x73/0xb0\n do_syscall_64+0xf9/0x540\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n Kernel panic - not syncing: Fatal exception\n\nSnapshot every input field of opts with READ_ONCE() before validating or\nusing it. The netns_id snapshot keeps the namespace get/put pair\nbalanced, while the other snapshots keep the remaining options from\nchanging partway through an invocation. The individual reads can still\nobserve an inconsistent combination during a concurrent update, but each\nselected field value remains stable for that invocation."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbpf: Soluciona el desequilibrio de referencia de netns en las kfuncs de conntrack\n\nEl argumento opts de las kfuncs de conntrack de BPF puede apuntar a un valor de mapa compartido. __bpf_nf_ct_lookup() y __bpf_nf_ct_alloc_entry() leen opts -> netns_id por separado al adquirir y liberar la referencia del espacio de nombres de red.\n\nEl desequilibrio de referencia puede ocurrir de la siguiente manera:\n\n CPU 0 CPU 1\n lee opts -> netns_id (-1)\n omite get_net_ns_by_id()\n escribe opts -> netns_id (id)\n lee opts -> netns_id (id)\n put_net(net) /* no hay 'get' coincidente */\n\nLa transici\u00f3n inversa filtra la referencia. Repetir el 'put' sin coincidencia puede destruir un espacio de nombres activo y provocar un fallo en usuarios posteriores.\n\nEl kernel inform\u00f3:\n\n Oops: fallo de protecci\u00f3n general, probablemente por direcci\u00f3n no can\u00f3nica\n KASAN: null-ptr-deref en el rango [0x00000000000000e8-0x00000000000000ef]\n RIP: 0010:bpf_prog_test_run_xdp+0x52c/0x1700\n Call Trace:\n __sys_bpf+0x1662/0x50c0\n __x64_sys_bpf+0x73/0xb0\n do_syscall_64+0xf9/0x540\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n P\u00e1nico del kernel - no sincronizando: Excepci\u00f3n fatal\n\nRealice una instant\u00e1nea de cada campo de entrada de opts con READ_ONCE() antes de validarlo o usarlo. La instant\u00e1nea de netns_id mantiene equilibrado el par 'get/put' del espacio de nombres, mientras que las otras instant\u00e1neas evitan que las opciones restantes cambien a mitad de una invocaci\u00f3n. Las lecturas individuales a\u00fan pueden observar una combinaci\u00f3n inconsistente durante una actualizaci\u00f3n concurrente, pero cada valor de campo seleccionado permanece estable para esa invocaci\u00f3n."}], "id": "CVE-2026-74715", "lastModified": "2026-10-30T13:20:04.647", "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-2026-74715", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T19:15:29.946901Z", "version": "2.0.3"}}]}, "published": "2026-08-22T16:16:46.313", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/41731d4290400cb898f15f049ae4018d45415e69"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4af94462c0ca2187a02a1a6641020ae888c74d5c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cfde990193135a35637e55f69e83e4ab441e60ab"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e5e060eb63d10b41ab60fd955649479d99b38210"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fb22bedf0c4f4f05bfa6e4a7ec0fd97bbdff9ce8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fdeba03fea78407a8c52faa99177c9f7f29f90eb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: bpf: Fix netns reference imbalance in conntrack kfuncs", "id": "2521369", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2521369"}, "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-476", "details": ["A flaw was found in the kernel. A reference imbalance vulnerability exists in the Berkeley Packet Filter (BPF) conntrack kfuncs. This occurs when the 'opts' argument, which can point to a shared map value, has its network namespace identifier (netns_id) read separately during reference acquisition and release. A concurrent update can lead to an unmatched release, which can destroy a live network namespace. This issue can result in a kernel panic and a system crash, effectively causing a Denial of Service."], "name": "CVE-2026-74715", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "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": "2026-08-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74715\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74715\nhttps://lore.kernel.org/linux-cve-announce/2026082238-CVE-2026-74715-a8ca@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[aed8ee7feb44b6537af1e0b4f03365d42928be38,e5e060eb63d10b41ab60fd955649479d99b38210)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[aed8ee7feb44b6537af1e0b4f03365d42928be38,fdeba03fea78407a8c52faa99177c9f7f29f90eb)"}}], "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": "generic", "value": "6.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.9,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-08-22T18:00:04.733173+00:00", "updated": "2026-08-25T09:30:05.486531+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}