CVE-2026-80728
Received Received - Intake

Kernel Page Fault in AMDGPU Driver Due to Reverted Fix

Publication date: 2026-09-03

Last updated on: 2026-09-03

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: Revert "drm/amdgpu: fix aperture mapping leak" devres teardown is LIFO. The aperture devres node was registered after the DRM device node, so devres_release_all() unmaps the aperture before the DRM device release callback fires amdgpu_device_fini_sw(). IP sw_fini callbacks (e.g. vcn_v4_0_sw_fini) write to fw_shared through a pointer derived from aper_base_kaddr, causing a kernel page fault on probe failure / rollback: BUG: unable to handle page fault ... PMD 0 RIP: vcn_v4_0_sw_fini+0x7b/0x170 [amdgpu] Call Trace: amdgpu_device_fini_sw amdgpu_driver_release_kms devm_drm_dev_init_release devres_release_all This reverts commit d871e99879cb5fd1fa798b006b4888887e63a17a. (cherry picked from commit 336e0cd576817ac64a4b394ca2b3680029f3e37f)

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Meta Information

Published
2026-09-03
Last Modified
2026-09-03
Generated
2026-09-03
AI Q&A
2026-09-03
EPSS Evaluated
N/A
NVD
CVE-2026-80728
EUVD
EUVD-2026-70332

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
amd amdgpu *

Helpful Resources

Exploitability

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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a Linux kernel vulnerability in the AMD GPU driver (amdgpu). It involves a memory mapping issue where the aperture mapping is released before the GPU device cleanup completes. This causes a kernel page fault when firmware-related operations try to access memory through a now-invalid pointer during system rollback or probe failure.

Detection Guidance

This vulnerability is specific to the Linux kernel's AMDGPU driver and may not have direct network detection methods. Check kernel logs for page faults or errors related to amdgpu or vcn_v4_0_sw_fini. Commands like dmesg | grep -i amdgpu or journalctl -k | grep -i page fault may help identify issues.

Impact Analysis

This vulnerability can cause system crashes or instability when AMD GPUs are initialized or deinitialized, particularly during error handling or driver unloading. Users may experience kernel panics, application failures, or system freezes when using affected AMD GPU hardware.

Mitigation Strategies

Update your Linux kernel to a patched version that includes the revert of the faulty commit. If using a distribution kernel, apply available updates. For custom kernels, ensure the patch is backported. Monitor kernel logs for errors after updating.

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