SB2025080623 - Deadlock in Linux kernel ksmbd component
Published: August 6, 2025
Security Bulletin ID
SB2025080623
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Deadlock (CVE-ID: CVE-2023-32253)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the ksmbd_find_crypto_ctx() function of the ksmbd component when handling SMB2_SESSION_SETUP commands. A remote attacker can send specially crafted data to the ksmbd daemon and perform a denial of service attack.
Remediation
Install update from vendor's website.