SB2025050420 - Use-after-free in Linux kernel cifs

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Main Vulnerability Database SB2025050420

SB2025050420 - Use-after-free in Linux kernel cifs

Published: May 4, 2025 Updated: May 10, 2025

Security Bulletin ID SB2025050420
Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Use-after-free (CVE-ID: CVE-2023-53047)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the tconInfoAlloc() and tconInfoFree() functions in fs/cifs/misc.c, within the DECLARE_RWSEM(), dfs_cache_destroy(), dfs_cache_add_refsrv_session() and dfs_cache_remount_fs() functions in fs/cifs/dfs_cache.c, within the get_session(), get_dfs_conn(), __dfs_mount_share() and dfs_mount_share() functions in fs/cifs/dfs.c, within the cifs_mount() and cifs_umount() functions in fs/cifs/connect.c. A local user can escalate privileges on the system.


Remediation

Install update from vendor's website.

References