Description
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.
References5
- git.kernel.org/stable/c/2dc125f5da134c0915a840b62565c60a595673dd
- git.kernel.org/stable/c/6f40e50ceb99fc8ef37e5c56e2ec1d162733fef0
- git.kernel.org/stable/c/867ffd9d67285612da3f0498ca618297f8e41f01
- git.kernel.org/stable/c/898d527ed94c19980a4d848f10057f1fed578ffb
- git.kernel.org/stable/c/a02e432d5130da4c723aabe1205bac805889fdb2
Metrics
- CVSS 3.1
-
7.1
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - EPSS — exploit probability
- 0% percentile: 4 · as of 10 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.