SB20250916227 - Improper locking in Linux kernel bridge
Published: September 16, 2025
Security Bulletin ID
SB20250916227
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) Improper locking (CVE-ID: CVE-2025-39773)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the net/bridge/br_private.h. 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/34171b9e53bd1dc264f5556579f2b04f04435c73
- https://git.kernel.org/stable/c/43e281fde5e76a866a4d10780c35023f16c0e432
- https://git.kernel.org/stable/c/5bf5fce8a0c2a70d063af778fdb5b27238174cdd
- https://git.kernel.org/stable/c/96476b043efb86a94f2badd260f7f99c97bd5893
- https://git.kernel.org/stable/c/bdb19cd0de739870bb3494c815138b9dc30875c4
- https://git.kernel.org/stable/c/d1547bf460baec718b3398365f8de33d25c5f36f