CVE-2023-53504: RDMA/bnxt_re: Properly order ib_device_unalloc() to avoid UAF

Severity: high (CVSS 7.8 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: 2025-10-01 · updated 2026-10-15
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/bnxt_re: Properly order ib_device_unalloc() to avoid UAF ib_dealloc_device() should be called only after device cleanup. Fix the dealloc sequence.

Affected products

Linux kernel: from 6.3 before 6.4.11; 6.5-rc1, 6.5-rc2, 6.5-rc3, 6.5-rc4, 6.5-rc5 — fixed in 6.4.11

How to fix

Upgrade to a fixed version: Linux kernel 6.4.11. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/5363fc488da579923edf6a2fdca3d3b651dd800b
https://git.kernel.org/stable/c/c95863f6d970ef968e7c1f3c481f72a4b0734654

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