SB2025100532 - Improper locking in Linux kernel mlx5 core driver
Published: October 5, 2025 Updated: October 27, 2025
Security Bulletin ID
SB2025100532
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-2023-53581)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the remove_unready_flow() and mlx5e_tc_del_fdb_flow() functions in drivers/net/ethernet/mellanox/mlx5/core/en_tc.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/30c281a77fb1b2d362030ea243dd663201d62a21
- https://git.kernel.org/stable/c/65e64640e97c0f223e77f9ea69b5a46186b93470
- https://git.kernel.org/stable/c/82ac62d76a000871004f534ad294e763e966d3b0
- https://git.kernel.org/stable/c/e962fd5933ebc767ce2a1cf7b7c85035b5a5d04c
- https://git.kernel.org/stable/c/f7ceedd1d124217a67ed1a67bbd7a7b1288705e3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.5