CVE-2023-54015: net/mlx5: Devcom, fix error flow in mlx5_devcom_register_device

Severity: unknown
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: 2025-12-24 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Devcom, fix error flow in mlx5_devcom_register_device In case devcom allocation is failed, mlx5 is always freeing the priv. However, this priv might have been allocated by a different thread, and freeing it might lead to use-after-free bugs. Fix it by freeing the priv only in case it was allocated by the running thread.

Affected products

Linux kernel: 5.0 — fixed in 6.4

How to fix

Upgrade to a fixed version: Linux kernel 6.4. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/1e755065368000205e6683fa924b2654e99f573b
https://git.kernel.org/stable/c/3dfc1004d9afbf689087ae1eafd88f55481984c7
https://git.kernel.org/stable/c/a3a516caef2c5be2f4d171890a8b3415bfab4e5e
https://git.kernel.org/stable/c/af87194352cad882d787d06fb7efa714acd95427
https://git.kernel.org/stable/c/d4d10a6df1529b3f446cdada5c25e065f4712756
https://git.kernel.org/stable/c/eaa365c10459052cbe3e44caa4ad760cb93bd435

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