SB20260529135 - Out-of-bounds read in Linux kernel smb client
Published: May 29, 2026
Security Bulletin ID
SB20260529135
CSH Severity
Medium
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-2026-46155)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in smb2_compound_op() when processing a crafted SMB server response. A remote attacker can send a truncated response with a large OutputBufferLength and an early-terminated EA list to disclose sensitive information.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/512d33bc8ea4ea5c19728ee118715f4b1f4d1926
- https://git.kernel.org/stable/c/8d09328dfda089675e4c049f3f256064a1d1996b
- https://git.kernel.org/stable/c/9b3af35645ff9cd334edc130249f9a2fb2bea25f
- https://git.kernel.org/stable/c/a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c
- https://git.kernel.org/stable/c/dffb44b2e06a2908e249f0f93156fc987eee1d1c