SB2025042298 - NULL pointer dereference in Linux kernel smb server
Published: April 22, 2025 Updated: May 10, 2025
Security Bulletin ID
SB2025042298
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2025-22037)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the smb2_handle_negotiate(), alloc_preauth_hash(), smb2_sess_setup() and smb2_session_logoff() functions in fs/smb/server/smb2pdu.c, within the destroy_previous_session() function in fs/smb/server/mgmt/user_session.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/8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d
- https://git.kernel.org/stable/c/b8eb243e670ecf30e91524dd12f7260dac07d335
- https://git.kernel.org/stable/c/c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780
- https://git.kernel.org/stable/c/ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.23