PT-2025-4356 · Linux+6 · Linux Kernel+6
Published
2025-01-15
·
Updated
2025-10-03
·
CVE-2025-21675
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions up to 6.1.126/6.6.73/6.12.10
Description
The vulnerability is related to a null pointer dereference in the
mlx5 lag destroy definers() function of the Linux kernel's mlx5 driver. This issue can cause a kernel crash when the mlx5 lag port sel create() function fails to create a port select structure, leading to a double destruction of lag definers. The vulnerability can be exploited to cause a denial of service.Recommendations
To resolve this issue, update the Linux kernel to a version later than 6.1.126/6.6.73/6.12.10. As a temporary workaround, consider disabling the
mlx5 lag destroy definers() function until a patch is available. Restrict access to the vulnerable module mlx5 core to minimize the risk of exploitation. Avoid using the mlx5 lag port sel create() function in the affected API endpoint until the issue is resolved.Exploit
Fix
NULL Pointer Dereference
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu