CVE-2025-21882: net/mlx5: Fix vport QoS cleanup on error

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-03-27 · updated 2026-07-30
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix vport QoS cleanup on error When enabling vport QoS fails, the scheduling node was never freed, causing a leak. Add the missing free and reset the vport scheduling node pointer to NULL.

Affected products

Linux kernel: from 6.13 before 6.13.6; 6.14-rc1, 6.14-rc2, 6.14-rc3, 6.14-rc4 — fixed in 6.13.6

How to fix

Upgrade to a fixed version: Linux kernel 6.13.6. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/7f3528f7d2f98b70e19a6bb7b130fc82c079ac54
https://git.kernel.org/stable/c/fead368502bce0e10bea7c0d2895b2fa0c6c10aa

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