Answer in brief
CVE-2025-40187 records a High severity (CVSS 7.5) vulnerability in net/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D_ce(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b <1014b83778c8677f1d7a57c26dc728baa801ac62 || >=30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b <7f702f85df0266ed7b5bab81ba50394c92f3c928 || >=30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b <dbceedc0213e75bf3e9f9f9e2f66b10699d004fe || >=30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b <025419f4e216a3ae0d0cec622262e98e8078c447 || >=30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b <c21f45cfa4a9526b34d76b397c9ef080668b6e73 || >=30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b <d0e8f1445c19b1786759ba72a38267e1449bab7e || >=30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b <badbd79313e6591616c1b78e29a9b71efed7f035 || >=30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b <2f3119686ef50319490ccaec81a575973da98815 | 1014b83778c8677f1d7a57c26dc728baa801ac62, 7f702f85df0266ed7b5bab81ba50394c92f3c928, dbceedc0213e75bf3e9f9f9e2f66b10699d004fe, 025419f4e216a3ae0d0cec622262e98e8078c447, c21f45cfa4a9526b34d76b397c9ef080668b6e73, d0e8f1445c19b1786759ba72a38267e1449bab7e, badbd79313e6591616c1b78e29a9b71efed7f035, 2f3119686ef50319490ccaec81a575973da98815 |
| Linux/Linuxgeneric | 4.17 | Not reported |
Published upstream
Nov 12, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.