CVE-2025-40187
Published Nov 12, 2025
Modified Apr 15, 2026
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.
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References
Other References
https://git.kernel.org/stable/c/025419f4e216a3ae0d0cec622262e98e8078c447
https://git.kernel.org/stable/c/1014b83778c8677f1d7a57c26dc728baa801ac62
https://git.kernel.org/stable/c/2f3119686ef50319490ccaec81a575973da98815
https://git.kernel.org/stable/c/7f702f85df0266ed7b5bab81ba50394c92f3c928
https://git.kernel.org/stable/c/badbd79313e6591616c1b78e29a9b71efed7f035
https://git.kernel.org/stable/c/c21f45cfa4a9526b34d76b397c9ef080668b6e73
https://git.kernel.org/stable/c/d0e8f1445c19b1786759ba72a38267e1449bab7e
https://git.kernel.org/stable/c/dbceedc0213e75bf3e9f9f9e2f66b10699d004fe
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 do I check if I'm vulnerable to CVE-2025-40187? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.