{"dataType": "CVE_RECORD", "dataVersion": "5.1", "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": "2025-09-16T08:11:28.519Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-09-16T08:11:28.519Z"}, "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2023-53296", "lastModified": "2025-09-16T12:49:16.060", "metrics": {}, "published": "2025-09-16T08:15:38.937", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0443fff49d6352160c200064156c25898bd9f58c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2584024b23552c00d95b50255e47bd18d306d31a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/667eb99cf7c15fe5b0ecefe75cf658e20ef20c9f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9346a1a21142357972a6f466ba6275ddc54b04ac"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a615e7270318fa0b98bf1ff38daf6cf52d840312"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b4b6dfad41aaae9e36e44327b18d5cf4b20dd2ce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d2128636b303aa9cf065055402ee6697409a8837"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: sctp: check send stream number after wait_for_sndbuf", "id": "2395682", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395682"}, "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"}, "details": ["No description is available for this CVE."], "name": "CVE-2023-53296", "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": "Out of support scope", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "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": "2025-09-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53296\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53296\nhttps://lore.kernel.org/linux-cve-announce/2025091627-CVE-2023-53296-9947@gregkh/T"], "threat_severity": "Moderate"}