SB2025091852 - Use-after-free in Linux kernel ksmbd
Published: September 18, 2025 Updated: September 22, 2025
Security Bulletin ID
SB2025091852
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2023-53358)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the smb2_tree_disconnect() function in fs/ksmbd/smb2pdu.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/30210947a343b6b3ca13adc9bfc88e1543e16dd5
- https://git.kernel.org/stable/c/39366b47a59d46af15ac57beb0996268bf911f6a
- https://git.kernel.org/stable/c/b36295c17fb97424406f0c3ab321b1ccaabb9be8
- https://git.kernel.org/stable/c/bd80d35725a0cf4df9307bfe2f1a3b2cb983d8e6
- https://git.kernel.org/stable/c/dc1c17716c099c90948ebb83e2170dd75a3be6b6
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.15