CVE-2026-74385

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If it fails (e.g., due to the socket\nnot being in TCP_ESTABLISHED state), the socket callbacks will not be\nproperly set, leading to queue and socket leakage.\n\nFix this by capturing the return value and calling\nnvmet_tcp_schedule_release_queue() on failure to ensure proper cleanup."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - The flaw is in nvmet-tcp, an in-kernel NVMe-over-TCP target that accepts remote TCP connections; the bug triggers in nvmet_tcp_tls_handshake_done() after tls_server_hello_psk() completes, reachable from any network peer that can connect to an exposed NVMe-oF TLS port (typical cloud/storage-server deployment).\nAC:L - An attacker controls both sides of the race by completing the TLS handshake and then closing or resetting the TCP connection so the socket is no longer TCP_ESTABLISHED when nvmet_tcp_set_queue_sock() runs; this is reliably repeatable across new connections without conditions outside attacker control.\nPR:N - Exploitation requires only network reachability to the NVMe-oF TCP target port; no Linux credentials, capabilities, or init-namespace root are needed, and the vulnerable path runs after TCP accept but before NVMe Connect, host NQN allow-list, or DH-HMAC-CHAP in-band authentication.\nUI:N - No victim user action is required; the attacker programmatically opens TLS connections to the NVMe target and times disconnects to hit the failure path, with no need for local users to mount filesystems or perform other interactive steps.\nS:U - Impact is confined to kernel resource exhaustion within the host running the NVMe target; leaked queues and sockets do not cross VM, container, or IOMMU security boundaries and do not constitute privilege escalation beyond the target kernel itself.\nC:N - The defect is a missed cleanup that leaks queue structures, sockets, and TLS key references; there is no use-after-free, out-of-bounds access, or other memory corruption that could expose kernel data to the attacker.\nI:N - No memory corruption, arbitrary write, or code-execution primitive is introduced; the bug only leaves queue and socket objects allocated without installing socket callbacks or scheduling proper teardown.\nA:H - Each successful trigger permanently leaks an nvmet_tcp_queue, socket/file reference, and IDA slot with no automatic recovery; repeated unauthenticated connections can exhaust kernel memory and socket resources, denying NVMe-oF service on internet-facing storage nodes until reboot."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/tcp.c"], "versions": [{"version": "675b453e024154dd547921c6e6d5b58747ba7e0e", "lessThan": "41b63ff99e3ef37d08f3693413dae5ede5e79fe1", "status": "affected", "versionType": "git"}, {"version": "675b453e024154dd547921c6e6d5b58747ba7e0e", "lessThan": "cba2ee57fd302727aea7d41e9d9cd0969f5df0fb", "status": "affected", "versionType": "git"}, {"version": "675b453e024154dd547921c6e6d5b58747ba7e0e", "lessThan": "22aa70f9a0544643ec37d442b6fcb1833d804462", "status": "affected", "versionType": "git"}, {"version": "675b453e024154dd547921c6e6d5b58747ba7e0e", "lessThan": "7ef789703e2b91775dcb36b2efa46325be31a2a0", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/nvme/target/tcp.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "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": "6.7", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/41b63ff99e3ef37d08f3693413dae5ede5e79fe1"}, {"url": "https://git.kernel.org/stable/c/cba2ee57fd302727aea7d41e9d9cd0969f5df0fb"}, {"url": "https://git.kernel.org/stable/c/22aa70f9a0544643ec37d442b6fcb1833d804462"}, {"url": "https://git.kernel.org/stable/c/7ef789703e2b91775dcb36b2efa46325be31a2a0"}], "title": "nvmet-tcp: check return value of nvmet_tcp_set_queue_sock", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-74385", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T18:55:01.310630Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:55:36.864Z"}}]}}

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this is reliably repeatable across new connections without conditions outside attacker control.\nPR:N - Exploitation requires only network reachability to the NVMe-oF TCP target port; no Linux credentials, capabilities, or init-namespace root are needed, and the vulnerable path runs after TCP accept but before NVMe Connect, host NQN allow-list, or DH-HMAC-CHAP in-band authentication.\nUI:N - No victim user action is required; the attacker programmatically opens TLS connections to the NVMe target and times disconnects to hit the failure path, with no need for local users to mount filesystems or perform other interactive steps.\nS:U - Impact is confined to kernel resource exhaustion within the host running the NVMe target; leaked queues and sockets do not cross VM, container, or IOMMU security boundaries and do not constitute privilege escalation beyond the target kernel itself.\nC:N - The defect is a missed cleanup that leaks queue structures, sockets, and TLS key references; there is no use-after-free, out-of-bounds access, or other memory corruption that could expose kernel data to the attacker.\nI:N - No memory corruption, arbitrary write, or code-execution primitive is introduced; the bug only leaves queue and socket objects allocated without installing socket callbacks or scheduling proper teardown.\nA:H - Each successful trigger permanently leaks an nvmet_tcp_queue, socket/file reference, and IDA slot with no automatic recovery; repeated unauthenticated connections can exhaust kernel memory and socket resources, denying NVMe-oF service on internet-facing storage nodes until reboot."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "675b453e024154dd547921c6e6d5b58747ba7e0e", "lessThan": "41b63ff99e3ef37d08f3693413dae5ede5e79fe1", "versionType": "git"}, {"status": "affected", "version": "675b453e024154dd547921c6e6d5b58747ba7e0e", "lessThan": "cba2ee57fd302727aea7d41e9d9cd0969f5df0fb", "versionType": "git"}, {"status": "affected", "version": "675b453e024154dd547921c6e6d5b58747ba7e0e", "lessThan": "22aa70f9a0544643ec37d442b6fcb1833d804462", "versionType": "git"}, {"status": "affected", "version": "675b453e024154dd547921c6e6d5b58747ba7e0e", "lessThan": "7ef789703e2b91775dcb36b2efa46325be31a2a0", "versionType": "git"}], "programFiles": ["drivers/nvme/target/tcp.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.7"}, {"status": "unaffected", "version": "0", "lessThan": "6.7", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.114", "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": ["drivers/nvme/target/tcp.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/41b63ff99e3ef37d08f3693413dae5ede5e79fe1"}, {"url": "https://git.kernel.org/stable/c/cba2ee57fd302727aea7d41e9d9cd0969f5df0fb"}, {"url": "https://git.kernel.org/stable/c/22aa70f9a0544643ec37d442b6fcb1833d804462"}, {"url": "https://git.kernel.org/stable/c/7ef789703e2b91775dcb36b2efa46325be31a2a0"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-tcp: check return value of nvmet_tcp_set_queue_sock\n\nThe return value of nvmet_tcp_set_queue_sock() is currently ignored in\nnvmet_tcp_tls_handshake_done(). If it fails (e.g., due to the socket\nnot being in TCP_ESTABLISHED state), the socket callbacks will not be\nproperly set, leading to queue and socket leakage.\n\nFix this by capturing the return value and calling\nnvmet_tcp_schedule_release_queue() on failure to ensure proper cleanup."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.114", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.40", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.5", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "6.7"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:45:33.852Z"}}}, "cveMetadata": {"cveId": "CVE-2026-74385", "state": "PUBLISHED", "dateUpdated": "2026-10-21T12:45:33.852Z", "dateReserved": "2026-08-15T05:44:03.890Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T05:59:01.113Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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{"bugzilla": {"description": "kernel: nvmet-tcp: check return value of nvmet_tcp_set_queue_sock", "id": "2516837", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516837"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnvmet-tcp: check return value of nvmet_tcp_set_queue_sock\nThe return value of nvmet_tcp_set_queue_sock() is currently ignored in\nnvmet_tcp_tls_handshake_done(). If it fails (e.g., due to the socket\nnot being in TCP_ESTABLISHED state), the socket callbacks will not be\nproperly set, leading to queue and socket leakage.\nFix this by capturing the return value and calling\nnvmet_tcp_schedule_release_queue() on failure to ensure proper cleanup.", "A flaw was found in the `nvmet-tcp` component of the Linux kernel. This vulnerability arises from ignoring the return value of a function during the TLS handshake, specifically when the network socket is not in an established state. This oversight prevents proper cleanup, leading to the leakage of queues and sockets. An attacker could potentially exploit this issue to cause resource exhaustion, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-74385", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74385\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74385\nhttps://lore.kernel.org/linux-cve-announce/2026081506-CVE-2026-74385-b03d@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[675b453e024154dd547921c6e6d5b58747ba7e0e,cba2ee57fd302727aea7d41e9d9cd0969f5df0fb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[675b453e024154dd547921c6e6d5b58747ba7e0e,22aa70f9a0544643ec37d442b6fcb1833d804462)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[675b453e024154dd547921c6e6d5b58747ba7e0e,7ef789703e2b91775dcb36b2efa46325be31a2a0)"}}], "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": "6.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.7)"}}, {"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": "2026-08-15T13:30:04.657445+00:00", "updated": "2026-08-21T23:45:03.464855+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-401", "CWE-772"]}