SB2025070536 - NULL pointer dereference in Linux kernel smb server
Published: July 5, 2025
Security Bulletin ID
SB2025070536
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) NULL pointer dereference (CVE-ID: CVE-2025-38191)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the krb5_authenticate() function in fs/smb/server/smb2pdu.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/076f1adefb9837977af7ed233883842ddc446644
- https://git.kernel.org/stable/c/0902625a24eea7fdc187faa5d97df244d159dd6e
- https://git.kernel.org/stable/c/1193486dffb7432a09f57f5d09049b4d4123538b
- https://git.kernel.org/stable/c/281afc52e2961cd5dd8326ebc9c5bc40904c0468
- https://git.kernel.org/stable/c/7ac5b66acafcc9292fb935d7e03790f2b8b2dc0e