SB2026011425 - Use-after-free in Linux kernel smb server
Published: January 14, 2026
Security Bulletin ID
SB2026011425
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-2025-68817)
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/smb/server/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/063cbbc6f595ea36ad146e1b7d2af820894beb21
- https://git.kernel.org/stable/c/21a3d01fc6db5129f81edb0ab7cb94fd758bcbea
- https://git.kernel.org/stable/c/b39a1833cc4a2755b02603eec3a71a85e9dff926
- https://git.kernel.org/stable/c/d092de8a26c952379ded8e6b0bda31d89befac1a
- https://git.kernel.org/stable/c/d64977495e44855f2b28d8ce56107c963a7a50e4