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CVE-2026-98779

drm/amdgpu: fix ACP MFD device leak on init failure

CVSS score

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EPSS probability

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Risk score

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Published

14 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

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Vulnerability description

CVE AI research

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DayBreach AI Explanation

Verified against sources

Linux kernel drm/amdgpu ACP MFD device leak vulnerability

Sources read

2

Source agreement

Tam uyum

Evidence confidence

%63

Short explanation

CVE-2026-98779 is a vulnerability in the Linux kernel drm/amdgpu component where ACP MFD devices are not properly released during initialization failures or power domain attachment timeouts, causing device leaks.

Why does it matter?

Failure to clean up resources during initialization errors can lead to system instability and potential memory leak issues.

What should be done?

  • Remove children from the power domain on failures occurring after mfd_add_devices succeeds
  • Unregister the MFD devices accordingly
  • Follow vendor advisories for updates
Chain of evidence and sources2 verified claims

Linux çekirdeği drm/amdgpu bileşeninde ACP MFD aygıt sızıntısı tespit edilmiştir.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd

Aygıt sızıntısı, başlatma aşamasında güç etki alanı veya zaman aşımı hataları sırasında ortaya çıkmaktadır.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd
Show the technical text from the sources

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)

Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-98779 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1linuxLinux View
2linuxLinux View
Total affected vendors: 1|Products: 2

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
The sources have not yet published a verified CVSS metric.

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

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Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-98779 is associated with the following CWEs:

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')CWE-20: Improper Input Validation

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-98779 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Official Sources and Advisories

https://git.kernel.org/stable/c/2b9a53940a2bc063ea4cd09ee49220a503a0170cvendor-advisoryhttps://git.kernel.org/stable/c/587469076e4ffb617f7ad1a0c4a13072a3e87113vendor-advisoryhttps://git.kernel.org/stable/c/abf854513bc19e6e24d45353ac99ec5627ee0accvendor-advisoryhttps://git.kernel.org/stable/c/f0013046151b7467e62c471c1c83d63ea255799cvendor-advisory

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