CVE-2023-53296 (GCVE-0-2023-53296)
Vulnerability from cvelistv5
Published
2025-09-16 08:11
Modified
2025-09-16 08:11
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
sctp: check send stream number after wait_for_sndbuf
This patch fixes a corner case where the asoc out stream count may change
after wait_for_sndbuf.
When the main thread in the client starts a connection, if its out stream
count is set to N while the in stream count in the server is set to N - 2,
another thread in the client keeps sending the msgs with stream number
N - 1, and waits for sndbuf before processing INIT_ACK.
However, after processing INIT_ACK, the out stream count in the client is
shrunk to N - 2, the same to the in stream count in the server. The crash
occurs when the thread waiting for sndbuf is awake and sends the msg in a
non-existing stream(N - 1), the call trace is as below:
KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f]
Call Trace:
<TASK>
sctp_cmd_send_msg net/sctp/sm_sideeffect.c:1114 [inline]
sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1777 [inline]
sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline]
sctp_do_sm+0x197d/0x5310 net/sctp/sm_sideeffect.c:1170
sctp_primitive_SEND+0x9f/0xc0 net/sctp/primitive.c:163
sctp_sendmsg_to_asoc+0x10eb/0x1a30 net/sctp/socket.c:1868
sctp_sendmsg+0x8d4/0x1d90 net/sctp/socket.c:2026
inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:825
sock_sendmsg_nosec net/socket.c:722 [inline]
sock_sendmsg+0xde/0x190 net/socket.c:745
The fix is to add an unlikely check for the send stream number after the
thread wakes up from the wait_for_sndbuf.
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| ▼ | Linux | Linux |
Version: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 Version: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 Version: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 Version: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 Version: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 Version: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 Version: 5bbbbe32a43199c2b9ea5ea66fab6241c64beb51 |
||||||
|
|||||||||
{
"containers": {
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{
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"product": "Linux",
"programFiles": [
"net/sctp/socket.c"
],
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"version": "0",
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{
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},
{
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"version": "5.4.241",
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},
{
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"status": "unaffected",
"version": "5.10.178",
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},
{
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"status": "unaffected",
"version": "5.15.107",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.24",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.2.*",
"status": "unaffected",
"version": "6.2.11",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.3",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
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"cpeMatch": [
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"negate": false,
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"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 \u003cTASK\u003e\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."
}
],
"providerMetadata": {
"dateUpdated": "2025-09-16T08:11:28.519Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
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{
"url": "https://git.kernel.org/stable/c/0443fff49d6352160c200064156c25898bd9f58c"
},
{
"url": "https://git.kernel.org/stable/c/b4b6dfad41aaae9e36e44327b18d5cf4b20dd2ce"
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{
"url": "https://git.kernel.org/stable/c/667eb99cf7c15fe5b0ecefe75cf658e20ef20c9f"
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{
"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": {
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}
},
"cveMetadata": {
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"cveId": "CVE-2023-53296",
"datePublished": "2025-09-16T08:11:28.519Z",
"dateReserved": "2025-09-16T08:09:37.993Z",
"dateUpdated": "2025-09-16T08:11:28.519Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
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"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2023-53296\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-16T08:15:38.937\",\"lastModified\":\"2025-09-16T12:49:16.060\",\"vulnStatus\":\"Awaiting Analysis\",\"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 \u003cTASK\u003e\\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.\"}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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