SB2025090834 - Memory leak in Linux kernel smb server
Published: September 8, 2025
Security Bulletin ID
SB2025090834
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) Memory leak (CVE-ID: CVE-2025-39720)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the smb_send_parent_lease_break_noti(), smb_lazy_parent_lease_break_close() and smb_break_all_levII_oplock() functions in fs/smb/server/oplock.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.