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CVE-2025-40187

HIGHCVSS 7.5/10EPSS 0.21%

Last modified

CVE-2025-40187 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
0.21%

11.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < 1014b83778c8677f1d7a57c26dc728baa801ac62; >= 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < 7f702f85df0266ed7b5bab81ba50394c92f3c928; >= 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < dbceedc0213e75bf3e9f9f9e2f66b10699d004fe; >= 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < 025419f4e216a3ae0d0cec622262e98e8078c447; >= 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < c21f45cfa4a9526b34d76b397c9ef080668b6e73; >= 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < d0e8f1445c19b1786759ba72a38267e1449bab7e; >= 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < badbd79313e6591616c1b78e29a9b71efed7f035; >= 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < 2f3119686ef50319490ccaec81a575973da98815
LinuxLinux4.17

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2025-40187?
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.
How severe is CVE-2025-40187?
CVE-2025-40187 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
How do I fix CVE-2025-40187?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST