SB20260325178 - Use of Uninitialized Variable in Linux kernel smb client
Published: March 25, 2026
Security Bulletin ID
SB20260325178
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use of Uninitialized Variable (CVE-ID: CVE-2026-23282)
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper initialization of variables in the SMB2 client implementation when handling failed SMB2 open or close operations. A local user can trigger a use of uninitialized memory to cause a denial of service.
The issue occurs when SMB2_open_init() or SMB2_close_init() fails during operations such as reconnect, leaving iovs in the request structure uninitialized, which can lead to a kernel oops when freed or accessed.
Remediation
Install update from vendor's website.