Answer in brief
CVE-2025-40084 records a High severity (CVSS 7.1) vulnerability in ksmbd: transport_ipc: validate payload size before reading handle. 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 7.1. 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 | >=0626e6641f6b467447c81dd7678a69c66f7746cf <a02e432d5130da4c723aabe1205bac805889fdb2 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <2dc125f5da134c0915a840b62565c60a595673dd || >=0626e6641f6b467447c81dd7678a69c66f7746cf <898d527ed94c19980a4d848f10057f1fed578ffb || >=0626e6641f6b467447c81dd7678a69c66f7746cf <867ffd9d67285612da3f0498ca618297f8e41f01 || >=0626e6641f6b467447c81dd7678a69c66f7746cf <6f40e50ceb99fc8ef37e5c56e2ec1d162733fef0 | a02e432d5130da4c723aabe1205bac805889fdb2, 2dc125f5da134c0915a840b62565c60a595673dd, 898d527ed94c19980a4d848f10057f1fed578ffb, 867ffd9d67285612da3f0498ca618297f8e41f01, 6f40e50ceb99fc8ef37e5c56e2ec1d162733fef0 |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
Oct 29, 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: ksmbd: transport_ipc: validate payload size before reading handle handle_response() dereferences the payload as a 4-byte handle without verifying that the declared payload size is at least 4 bytes. A malformed or truncated message from ksmbd.mountd can lead to a 4-byte read past the declared payload size. Validate the size before dereferencing. This is a minimal fix to guard the initial handle read.
Quoted source text, attributed separately from HOL analysis.