HighFix available
net/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D_ce()
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: net/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D_ce() If new_asoc->peer.adaptation_ind=0 and sctp_ulpevent_make_authkey=0 and sctp_ulpevent_make_authkey() returns 0, then the variable ai_ev remains zero and the zero will be dereferenced in the sctp_ulpevent_free() function.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.246, 5.15.195, 5.4.301, 6.1.157, 6.12.54, 6.17.4, 6.6.113
- CVEs
- CVE-2025-40187
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 17:45 UTC · Revision 1
Source evidence
net/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D_ce()
core-osv · Original sourcePublished 12 Nov 2025, 21:56 UTC
In the Linux kernel, the following vulnerability has been resolved: net/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D_ce() If new_asoc->peer.adaptation_ind=0 and sctp_ulpevent_make_authkey=0 and sctp_ulpevent_make_authkey() returns 0, then the variable ai_ev remains zero and the zero will be dereferenced in the sctp_ulpevent_free() function.
osv:CVE-2025-40187
Kernel
Fixed versions: 5.4.301, 5.10.246, 5.15.195, 6.1.157, 6.6.113, 6.12.54, 6.17.4
Complete source record
{
"id": "f9dab839ac6037f150c694550c23980db370682a89e91a62e11283cae67558a1",
"url": "https://osv.dev/vulnerability/CVE-2025-40187",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "net/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D_ce()",
"summary": "In the Linux kernel, the following vulnerability has been resolved: net/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D_ce() If new_asoc->peer.adaptation_ind=0 and sctp_ulpevent_make_authkey=0 and sctp_ulpevent_make_authkey() returns 0, then the variable ai_ev remains zero and the zero will be dereferenced in the sctp_ulpevent_free() function.",
"evidence": "osv:CVE-2025-40187",
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"modified": "2026-10-28T02:30:38.095065307Z",
"provider": "osv",
"references": [
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"https://git.kernel.org/stable/c/1014b83778c8677f1d7a57c26dc728baa801ac62",
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"https://git.kernel.org/stable/c/d0e8f1445c19b1786759ba72a38267e1449bab7e",
"https://git.kernel.org/stable/c/dbceedc0213e75bf3e9f9f9e2f66b10699d004fe",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40187.json",
"https://nvd.nist.gov/vuln/detail/CVE-2025-40187",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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"provider_metadata": {
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"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40187.json"
}
},
"related_cves": [
{
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"evidence": "/id"
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"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 505449,
"published_at": "2025-11-12T21:56:29.504+00:00"
}