SB2025081868 - Input validation error in Linux kernel ksmbd
Published: August 18, 2025 Updated: August 29, 2025
Security Bulletin ID
SB2025081868
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) Input validation error (CVE-ID: CVE-2023-4515)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the ksmbd_smb2_check_message() function in fs/ksmbd/smb2misc.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/595679098bdcdbfbba91ebe07a2f7f208df93870
- https://git.kernel.org/stable/c/5aa4fda5aa9c2a5a7bac67b4a12b089ab81fee3c
- https://git.kernel.org/stable/c/c6bef3bc30fd4a175aef846b7d928a6c40d091cd
- https://git.kernel.org/stable/c/ff7236b66d69582f90cf5616e63cfc3dc18142bb
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.11