ksmbd: validate zero num_subauth before sub_auth is accessed
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.3epss 0.5%
exploitation probability
0.5%top 57% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/0e36a3e080d6d8bd7a34e089345d043da4ac8283https://git.kernel.org/stable/c/3ac65de111c686c95316ade660f8ba7aea3cd3cchttps://git.kernel.org/stable/c/56de7778a48560278c334077ace7b9ac4bfb2fd1https://git.kernel.org/stable/c/68c6c3142bfcdb049839d40a9a59ebe8ea865002https://git.kernel.org/stable/c/bf21e29d78cd2c2371023953d9c82dfef82ebb36https://git.kernel.org/stable/c/c8bfe1954a0b89e7b29b3a3e7f4c5e0ebd295e20https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html