High 7.5Published Nov 12, 2025

CVE-2025-40187net/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D_ce()

Updated under an hour ago (Oct 26, 2026, 3:50 PM ET)

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Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b before 1014b83778c8677f1d7a57c26dc728baa801ac62; 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b builds before 7f702f85df0266ed7b5bab81ba50394c92f3c928; from 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b before dbceedc0213e75bf3e9f9f9e2f66b10699d004fe; from 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b before 025419f4e216a3ae0d0cec622262e98e8078c447; from 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b before c21f45cfa4a9526b34d76b397c9ef080668b6e73; from 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b before d0e8f1445c19b1786759ba72a38267e1449bab7e; from 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b before badbd79313e6591616c1b78e29a9b71efed7f035; 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b builds before 2f3119686ef50319490ccaec81a575973da98815	CNA record

References

References

https://git.kernel.org/stable/c/1014b83778c8677f1d7a57c26dc728baa801ac62
https://git.kernel.org/stable/c/7f702f85df0266ed7b5bab81ba50394c92f3c928
https://git.kernel.org/stable/c/dbceedc0213e75bf3e9f9f9e2f66b10699d004fe
https://git.kernel.org/stable/c/025419f4e216a3ae0d0cec622262e98e8078c447
https://git.kernel.org/stable/c/c21f45cfa4a9526b34d76b397c9ef080668b6e73
https://git.kernel.org/stable/c/d0e8f1445c19b1786759ba72a38267e1449bab7e
https://git.kernel.org/stable/c/badbd79313e6591616c1b78e29a9b71efed7f035
https://git.kernel.org/stable/c/2f3119686ef50319490ccaec81a575973da98815

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.