Answer in brief
CVE-2025-40084 records a Unknown severity 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.
A CVSS score is not reported in the current record. 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
Aug 5, 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.
Answer in brief
CVE-2025-40084 records a Unknown severity 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.
A CVSS score is not reported in the current record. 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
Aug 5, 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.