CVE-2026-98785
Received Received - Intake

NULL Pointer Dereference in Linux Kernel AMD Display Driver

Publication date: 2026-10-18

Last updated on: 2026-10-18

Assigner: kernel.org

Description
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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Meta Information

Published
2026-10-18
Last Modified
2026-10-18
Generated
2026-10-18
AI Q&A
2026-10-18
EPSS Evaluated
N/A
NVD
CVE-2026-98785
EUVD
EUVD-2026-103870

Affected Vendors & Products

Showing 15 associated CPEs
Vendor Product Version / Range
Linux Linux 8092aa3ab8f7b737a34b71f91492c676a843043a
Linux Linux 8092aa3ab8f7b737a34b71f91492c676a843043a
Linux Linux 8092aa3ab8f7b737a34b71f91492c676a843043a
Linux Linux 8092aa3ab8f7b737a34b71f91492c676a843043a
Linux Linux ea000e4b4ee5363997715531cb3d024b4e5d561c
Linux Linux d0b8b23b9c2ebec693a36fea518d8f13493ad655
Linux Linux 83c7f509ef087041604e9572938f82e18b724c9d
Linux Linux 4cc2a94d96caeb3c975acdae7351c2f997c32175
Linux Linux 1686675405d07f35eae7ff3d13a530034b899df2
Linux Linux 5.10.258
Linux Linux 5.15.165
Linux Linux 6.1.105
Linux Linux 6.6.46
Linux Linux 6.10.5
Linux Linux 6.11

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Exploitability

CWE
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a NULL pointer dereference vulnerability in the Linux kernel's AMD display driver. It occurs when dc_state_create_copy() fails to allocate memory and returns NULL. The dm_suspend() function does not properly handle this NULL return, leading to a crash during GPU reset recovery when dm_resume() tries to access the NULL cached_dc_state.

Detection Guidance

This vulnerability is specific to the Linux kernel's AMD display driver (drm/amd/display). Detection requires checking kernel logs for GPU-related crashes during suspend/resume operations or GPU reset recovery. Monitor system logs for NULL pointer dereference errors in AMD display components.

Impact Analysis

This vulnerability can cause system crashes during GPU operations, particularly when suspending or resuming the display. Users may experience unexpected system freezes or reboots when using AMD GPUs with affected Linux kernel versions.

Mitigation Strategies

Apply the latest kernel update that includes the fix for this issue. If immediate patching is not possible, avoid using suspend/resume functionality on systems with AMD GPUs until the update is applied. Monitor vendor advisories for kernel updates addressing this specific issue.

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