SB2025050455 - Improper locking in Linux kernel cifs

Description

This security bulletin contains information about 1 security vulnerability.

1) Improper locking (CVE-ID: CVE-2023-53052)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking 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 perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/396935de145589c8bfe552fa03a5e38604071829
• https://git.kernel.org/stable/c/5a89d81c1a3c152837ea204fd29572228e54ce0b
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.8