{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-53206", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-11-19T17:17:25.019Z", "datePublished": "2024-12-27T13:49:52.131Z", "dateUpdated": "2026-08-05T11:44:35.910Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:44:35.910Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: Fix use-after-free of nreq in reqsk_timer_handler().\n\nThe cited commit replaced inet_csk_reqsk_queue_drop_and_put() with\n__inet_csk_reqsk_queue_drop() and reqsk_put() in reqsk_timer_handler().\n\nThen, oreq should be passed to reqsk_put() instead of req; otherwise\nuse-after-free of nreq could happen when reqsk is migrated but the\nretry attempt failed (e.g. due to timeout).\n\nLet's pass oreq to reqsk_put()." } ], "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 - The vulnerable request sock and its timer are created purely by inbound TCP SYN packets to a listening port, and the failure branch is driven by the remote peer withholding or racing the final ACK. This is core TCP/IP receive-path code reachable by any remote client, including internet-facing servers.\nAC:L - The attacker controls both the object supply (SYN flood populates the SYN queue and the request_sock slab) and the branch selection (never ACK to force `expire`, or send the final ACK concurrently to lose the `own_req` race), giving repeatable success. Listener migration is a routine, recurring event on exactly the SO_REUSEPORT rolling-restart/worker-recycle deployments that enable `tcp_migrate_req`, so a persistent attacker hits it without special effort.\nPR:N - No authentication or credentials of any kind are needed — the attacker only sends SYNs to an open TCP port and declines to complete the handshake. The entire path executes in the pre-connection SYN-queue/timer context.\nUI:N - The whole sequence runs in softirq timer context off attacker-supplied packets, with no action required from any local user or administrator.\nS:U - The corruption is confined to kernel slab memory and kernel socket structures within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The use-after-free lets the attacker reoccupy the freed `request_sock` slot with objects whose contents they control via crafted SYNs, and the resulting premature free of a live reqsk yields reads of `rsk_ops`, `rsk_listener`, and `saved_syn` from attacker-groomed memory, enabling kernel memory disclosure.\nI:H - `reqsk_put()` on freed memory performs a write (refcount decrement) into the slab, which can corrupt the SLUB free pointer or underflow a live request sock's refcount, cascading to an indirect call through `req->rsk_ops->destructor` read from freed memory and a `sock_put()` listener refcount underflow — a control-flow-hijack-capable primitive.\nA:H - Even without full exploitation, the use-after-free and the resulting premature frees/refcount underflows on hashed request socks and listener sockets reliably produce slab corruption and kernel oops/panic, remotely and repeatably." } ] } ], "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": "8459d61fbf24967839a70235165673148c7c7f17", "lessThan": "2dcc86fefe09ac853158afd96b60d544af115dc5", "status": "affected", "versionType": "git" }, { "version": "5071beb59ee416e8ab456ac8647a4dabcda823b1", "lessThan": "9a3c1ad93e6fba67b3a637cfa95a57a6685e4908", "status": "affected", "versionType": "git" }, { "version": "997ae8da14f1639ce6fb66a063dab54031cd61b3", "lessThan": "65ed89cad1f57034c256b016e89e8c0a4ec7c65b", "status": "affected", "versionType": "git" }, { "version": "51e34db64f4e43c7b055ccf881b7f3e0c31bb26d", "lessThan": "d0eb14cb8c08b00c36a3d5dc57a6f428b301f721", "status": "affected", "versionType": "git" }, { "version": "e8c526f2bdf1845bedaf6a478816a3d06fa78b8f", "lessThan": "6d845028609a4af0ad66f499ee0bd5789122b067", "status": "affected", "versionType": "git" }, { "version": "e8c526f2bdf1845bedaf6a478816a3d06fa78b8f", "lessThan": "c31e72d021db2714df03df6c42855a1db592716c", "status": "affected", "versionType": "git" }, { "version": "106e457953315e476b3642ef24be25ed862aaba3", "status": "affected", "versionType": "git" }, { "version": "c964bf65f80a14288d767023a1b300b30f5b9cd0", "status": "affected", "versionType": "git" }, { "version": "5.15.170", "lessThan": "5.15.174", "status": "affected", "versionType": "semver" }, { "version": "6.1.115", "lessThan": "6.1.120", "status": "affected", "versionType": "semver" }, { "version": "6.6.59", "lessThan": "6.6.64", "status": "affected", "versionType": "semver" }, { "version": "6.11.6", "lessThan": "6.11.11", "status": "affected", "versionType": "semver" }, { "version": "5.4.293", "lessThan": "5.5", "status": "affected", "versionType": "semver" }, { "version": "5.10.237", "lessThan": "5.11", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv4/inet_connection_sock.c" ], "versions": [ { "version": "6.12", "status": "affected" }, { "version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.174", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.120", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.64", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.11", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.2", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13", "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": "5.15.170", "versionEndExcluding": "5.15.174" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.115", "versionEndExcluding": "6.1.120" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.59", "versionEndExcluding": "6.6.64" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11.6", "versionEndExcluding": "6.11.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.12.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.293" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.237" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/2dcc86fefe09ac853158afd96b60d544af115dc5" }, { "url": "https://git.kernel.org/stable/c/9a3c1ad93e6fba67b3a637cfa95a57a6685e4908" }, { "url": "https://git.kernel.org/stable/c/65ed89cad1f57034c256b016e89e8c0a4ec7c65b" }, { "url": "https://git.kernel.org/stable/c/d0eb14cb8c08b00c36a3d5dc57a6f428b301f721" }, { "url": "https://git.kernel.org/stable/c/6d845028609a4af0ad66f499ee0bd5789122b067" }, { "url": "https://git.kernel.org/stable/c/c31e72d021db2714df03df6c42855a1db592716c" } ], "title": "tcp: Fix use-after-free of nreq in reqsk_timer_handler().", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-53206", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-11T15:43:21.588054Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-11T15:45:26.365Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T20:47:34.185Z" } } ] } }