SB2025082869 - NULL pointer dereference in Linux kernel hw mlx5 driver
Published: August 28, 2025
Security Bulletin ID
SB2025082869
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-2025-38645)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the mlx5_init_once() function in drivers/net/ethernet/mellanox/mlx5/core/main.c, within the mlx5_dm_create() and kfree() functions in drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c, within the handle_alloc_dm_memic() function in drivers/infiniband/hw/mlx5/dm.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/3046b011d368162b1b9ca9453eee0fea930e0a93
- https://git.kernel.org/stable/c/4249f1307932f1b6bbb8b7eba60d82f0b7e44430
- https://git.kernel.org/stable/c/62d7cf455c887941ed6f105cd430ba04ee0b6c9f
- https://git.kernel.org/stable/c/70f238c902b8c0461ae6fbb8d1a0bbddc4350eea
- https://git.kernel.org/stable/c/da899a1fd7c40e2e4302af1db7d0b8540fb22283
- https://git.kernel.org/stable/c/eebb225fe6c9103293807b8edabcbad59f9589bc