{"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   <TASK>\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"}}]}}