Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate zero num_subauth before sub_auth is accessed Access psid->sub_auth[psid->num_subauth - 1] without checking if num_subauth is non-zero leads to an out-of-bounds read. This patch adds a validation step to ensure num_subauth != 0 before sub_auth is accessed.
Affected products
linux: linux kernel
References7
- git.kernel.org/stable/c/0e36a3e080d6d8bd7a34e089345d043da4ac8283 Patch
- git.kernel.org/stable/c/3ac65de111c686c95316ade660f8ba7aea3cd3cc Patch
- git.kernel.org/stable/c/56de7778a48560278c334077ace7b9ac4bfb2fd1 Patch
- git.kernel.org/stable/c/68c6c3142bfcdb049839d40a9a59ebe8ea865002 Patch
- git.kernel.org/stable/c/bf21e29d78cd2c2371023953d9c82dfef82ebb36 Patch
- git.kernel.org/stable/c/c8bfe1954a0b89e7b29b3a3e7f4c5e0ebd295e20 Patch
- lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Metrics
- CVSS 3.1
-
7.1
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - EPSS — exploit probability
- 1% percentile: 48 · as of 7 November 2026
- CWE
- CWE-125
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.