CVE-2026-72499: RDMA/bnxt_re: Free CQ toggle page after firmware teardown

Severity: high (CVSS 8.8 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: 2026-08-15 · updated 2026-10-21

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/bnxt_re: Free CQ toggle page after firmware teardown Free the toggle page only after firmware teardown completes so that an NQ interrupt arriving during bnxt_qplib_destroy_cq() won't write the toggle value to an already-freed page. Move free_page() after bnxt_qplib_destroy_cq.

Affected products

Linux kernel: 6.8 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/33aed3ba04aa56eeeb876935896aa6530c46640e
https://git.kernel.org/stable/c/8a8d69a01bda1fec9b07b5559be2b6ed45b1e974
https://git.kernel.org/stable/c/b193854675ecad43b4d69c304c1b6a90b206cc99
https://git.kernel.org/stable/c/bb45e06f9914ca64ac95341a80a0c20bb8dd46a9

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