SB20261007193 - Out-of-bounds read in Linux kernel smb client
Published: October 7, 2026
Security Bulletin ID
SB20261007193
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-98167)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to trigger out-of-bounds reads.
The vulnerability exists due to incorrect sub-PDU length validation in the Linux kernel SMB client when processing compound encrypted SMB frames. A remote attacker can send a compound encrypted frame containing a truncated non-last sub-PDU to trigger out-of-bounds reads.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/282b72f9a7ef31296c48366db4128882999cc048
- https://git.kernel.org/stable/c/8703539d22fdbc13dd2db090ee199c3a427b8ea0
- https://git.kernel.org/stable/c/a46eb242e9eef3a3897d166748b23303c516e870
- https://git.kernel.org/stable/c/e78fc1d240b27349b45a0f1c3e3c2c401d7e230d
- https://git.kernel.org/stable/c/ebb8a075fdc7af3d196a4f158a0e18dbc394c0e3
- https://git.kernel.org/stable/c/f73726b83e4756fdaa099e1bc1143293bd57ad79