{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53296", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-16T08:09:37.993Z", "datePublished": "2025-09-16T08:11:28.519Z", "dateUpdated": "2026-05-11T19:42:12.034Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:42:12.034Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: check send stream number after wait_for_sndbuf\n\nThis patch fixes a corner case where the asoc out stream count may change\nafter wait_for_sndbuf.\n\nWhen the main thread in the client starts a connection, if its out stream\ncount is set to N while the in stream count in the server is set to N - 2,\nanother thread in the client keeps sending the msgs with stream number\nN - 1, and waits for sndbuf before processing INIT_ACK.\n\nHowever, after processing INIT_ACK, the out stream count in the client is\nshrunk to N - 2, the same to the in stream count in the server. The crash\noccurs when the thread waiting for sndbuf is awake and sends the msg in a\nnon-existing stream(N - 1), the call trace is as below:\n\n KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f]\n Call Trace:\n \n sctp_cmd_send_msg net/sctp/sm_sideeffect.c:1114 [inline]\n sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1777 [inline]\n sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline]\n sctp_do_sm+0x197d/0x5310 net/sctp/sm_sideeffect.c:1170\n sctp_primitive_SEND+0x9f/0xc0 net/sctp/primitive.c:163\n sctp_sendmsg_to_asoc+0x10eb/0x1a30 net/sctp/socket.c:1868\n sctp_sendmsg+0x8d4/0x1d90 net/sctp/socket.c:2026\n inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:825\n sock_sendmsg_nosec net/socket.c:722 [inline]\n sock_sendmsg+0xde/0x190 net/socket.c:745\n\nThe fix is to add an unlikely check for the send stream number after the\nthread wakes up from the wait_for_sndbuf." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/sctp/socket.c" ], "versions": [ { "version": "5bbbbe32a43199c2b9ea5ea66fab6241c64beb51", "lessThan": "9346a1a21142357972a6f466ba6275ddc54b04ac", "status": "affected", "versionType": "git" }, { "version": "5bbbbe32a43199c2b9ea5ea66fab6241c64beb51", "lessThan": "0443fff49d6352160c200064156c25898bd9f58c", "status": "affected", "versionType": "git" }, { "version": "5bbbbe32a43199c2b9ea5ea66fab6241c64beb51", "lessThan": "b4b6dfad41aaae9e36e44327b18d5cf4b20dd2ce", "status": "affected", "versionType": "git" }, { "version": "5bbbbe32a43199c2b9ea5ea66fab6241c64beb51", "lessThan": "667eb99cf7c15fe5b0ecefe75cf658e20ef20c9f", "status": "affected", "versionType": "git" }, { "version": "5bbbbe32a43199c2b9ea5ea66fab6241c64beb51", "lessThan": "d2128636b303aa9cf065055402ee6697409a8837", "status": "affected", "versionType": "git" }, { "version": "5bbbbe32a43199c2b9ea5ea66fab6241c64beb51", "lessThan": "a615e7270318fa0b98bf1ff38daf6cf52d840312", "status": "affected", "versionType": "git" }, { "version": "5bbbbe32a43199c2b9ea5ea66fab6241c64beb51", "lessThan": "2584024b23552c00d95b50255e47bd18d306d31a", "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/sctp/socket.c" ], "versions": [ { "version": "4.15", "status": "affected" }, { "version": "0", "lessThan": "4.15", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.281", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.241", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.178", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.107", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.24", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2.11", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.3", "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": "4.15", "versionEndExcluding": "4.19.281" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "5.4.241" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "5.10.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "5.15.107" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.1.24" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.2.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9346a1a21142357972a6f466ba6275ddc54b04ac" }, { "url": "https://git.kernel.org/stable/c/0443fff49d6352160c200064156c25898bd9f58c" }, { "url": "https://git.kernel.org/stable/c/b4b6dfad41aaae9e36e44327b18d5cf4b20dd2ce" }, { "url": "https://git.kernel.org/stable/c/667eb99cf7c15fe5b0ecefe75cf658e20ef20c9f" }, { "url": "https://git.kernel.org/stable/c/d2128636b303aa9cf065055402ee6697409a8837" }, { "url": "https://git.kernel.org/stable/c/a615e7270318fa0b98bf1ff38daf6cf52d840312" }, { "url": "https://git.kernel.org/stable/c/2584024b23552c00d95b50255e47bd18d306d31a" } ], "title": "sctp: check send stream number after wait_for_sndbuf", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2023-53296", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-01-14T18:12:16.722971Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:12:56.733Z" } } ] } }