SB20250919102 - NULL pointer dereference in Linux kernel ksmbd
Published: September 19, 2025 Updated: September 22, 2025
Security Bulletin ID
SB20250919102
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-2023-53399)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the smb2_get_info_filesystem() function in fs/ksmbd/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/1636e09779f83e10e6ed57d91ef94abcefdd206b
- https://git.kernel.org/stable/c/227eb2689b44d0d60da3839b146983e73435924c
- https://git.kernel.org/stable/c/3ac00a2ab69b34189942afa9e862d5170cdcb018
- https://git.kernel.org/stable/c/a70751dd7b60eab025e97e19b6b2477c6eaf2bbb
- https://git.kernel.org/stable/c/b35f6c031b87d9e51f141ff6de0ea59756a8e313
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.15