---
id: "CVE-2026-98785"
kind: "vulnerability"
aliases: ["CVE-2026-98785"]
title: "Linux kernel AMD display driver: NULL state crash during suspend and resume"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["amd-gpu", "desktop", "linux-kernel", "runtime", "workstation"]
not_affected_if: ["no-amd-gpu"]
published_at: "2026-10-18T16:17:32+00:00"
first_seen_at: "2026-10-23T21:57:16+00:00"
updated_at: "2026-10-25T05:15:19+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98785", "first_seen_at": "2026-10-23T21:57:16+00:00"}]
---

# Linux kernel AMD display driver: NULL state crash during suspend and resume

The AMD display driver in the Linux kernel did not check whether a copied display state allocation succeeded during suspend. On allocation failure, resume dereferences a NULL pointer and the GPU reset recovery crashes.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- `uname -r` to see the running kernel version
- `lsmod | grep amdgpu` to confirm the AMD GPU driver is loaded
- Compare the running kernel against the stable kernel release that includes commit 84b6d7932fdd2857795a257f9f258562a3cddcab, unknown from the sources

## Fix

- Update the Linux kernel to a stable release that includes commit 84b6d7932fdd2857795a257f9f258562a3cddcab, exact version unknown from the sources

## Timeline

- 2026-10-23T21:57:16+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-98785

## From the sources

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: check dc_state_create_copy() for NULL in dm_suspend

dc_state_create_copy() can return NULL on allocation failure.
dm_suspend() only conditionally skips dm_gpureset_toggle_interrupts()
and continues execution, returning success.  dm_resume() then
dereferences the NULL cached_dc_state in link_enc_cfg_copy() and the
following dc_state->stream_count loop, crashing during GPU reset
recovery.

Return -ENOMEM immediately if the copy fails, so the caller aborts
suspend instead of leaving a NULL cached state for resume.

(cherry picked from commit 84b6d7932fdd2857795a257f9f258562a3cddcab)

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