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… (CVE-2025-40187)
A high-severity vulnerability in the Linux kernel SCTP implementation involves a null pointer dereference in the sctp_disposition function sctp_sf_do_5_1D_ce(). This occurs when certain conditions cause a variable to remain zero and subsequently be dereferenced, leading to a potential denial of service. The issue has been resolved in the Linux kernel.
AI Analysis
Technical Summary
The vulnerability CVE-2025-40187 affects the Linux kernel's SCTP protocol implementation. Specifically, if new_asoc->peer.adaptation_ind equals 0 and sctp_ulpevent_make_authkey returns 0, the variable ai_ev remains zero and is dereferenced in sctp_ulpevent_free(), causing a null pointer dereference. This can result in a denial of service condition. The vulnerability has been fixed in the Linux kernel source code.
Potential Impact
The vulnerability can cause a denial of service (DoS) due to a null pointer dereference in the SCTP protocol handling within the Linux kernel. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel. Users should apply the official Linux kernel updates that include this patch. Since no vendor advisory or patch links are provided, users should monitor official Linux kernel release notes for the relevant fix. Patch status is not yet confirmed in this data — check the vendor advisory for current remediation guidance.
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… (CVE-2025-40187)
Description
A high-severity vulnerability in the Linux kernel SCTP implementation involves a null pointer dereference in the sctp_disposition function sctp_sf_do_5_1D_ce(). This occurs when certain conditions cause a variable to remain zero and subsequently be dereferenced, leading to a potential denial of service. The issue has been resolved in the Linux kernel.
CVSS v3.1
Score 7.5high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2025-40187 affects the Linux kernel's SCTP protocol implementation. Specifically, if new_asoc->peer.adaptation_ind equals 0 and sctp_ulpevent_make_authkey returns 0, the variable ai_ev remains zero and is dereferenced in sctp_ulpevent_free(), causing a null pointer dereference. This can result in a denial of service condition. The vulnerability has been fixed in the Linux kernel source code.
Potential Impact
The vulnerability can cause a denial of service (DoS) due to a null pointer dereference in the SCTP protocol handling within the Linux kernel. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel. Users should apply the official Linux kernel updates that include this patch. Since no vendor advisory or patch links are provided, users should monitor official Linux kernel release notes for the relevant fix. Patch status is not yet confirmed in this data — check the vendor advisory for current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-xp33-mgvv-9242
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2025-40187"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a6b72d59c2644c7f8479c8e
Added to database: 07/30/2026, 15:50:45 UTC
Last enriched: 07/30/2026, 17:22:59 UTC
Last updated: 09/10/2026, 19:26:54 UTC
Views: 10
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