SB2025120855 - Use-after-free in Linux kernel cifs
Published: December 8, 2025 Updated: December 12, 2025
Security Bulletin ID
SB2025120855
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-2023-53751)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the cifs_chan_is_iface_active() and cifs_try_adding_channels() functions in fs/cifs/sess.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0b08c4c499200be67d54c439d56e5ea866869945
- https://git.kernel.org/stable/c/64d62ac6d6514cba1305bd08e271ec1843bdd612
- https://git.kernel.org/stable/c/90c49fce1c43e1cc152695e20363ff5087897c09
- https://git.kernel.org/stable/c/c511954bf142fe1995aec3c739a9f1a76990283a
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.15