CVE-2026-68236
Received Received - Intake

Double Free in AMD Display Driver

Publication date: 2026-08-10

Last updated on: 2026-08-10

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: set new_stream to NULL after release In dm_update_crtc_state(), the skip_modeset path releases new_stream via dc_stream_release() but does not set the pointer to NULL. If a later error (e.g., color management failure) triggers the fail label, the error path calls dc_stream_release() again on the same dangling pointer, causing a double release and potential use-after-free. Fix this by setting new_stream to NULL after the initial release. (cherry picked from commit 99f3af19073b3ddbfd96e789124cce12c4277b28)

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Meta Information

Published
2026-08-10
Last Modified
2026-08-10
Generated
2026-08-10
AI Q&A
2026-08-10
EPSS Evaluated
N/A
NVD
CVE-2026-68236
EUVD
EUVD-2026-55337

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a use-after-free vulnerability in the Linux kernel's AMD display driver. It occurs when a pointer to a display stream is released but not set to NULL, leading to a double release if an error occurs later. This can cause memory corruption or crashes.

Detection Guidance

This vulnerability is specific to the Linux kernel's AMD display driver. Detection requires checking kernel logs for double release errors in drm/amd/display or amdgpu components. Use commands like dmesg | grep -i 'double release' or journalctl -k | grep -i 'use-after-free' to search for related errors.

Impact Analysis

This vulnerability could cause system instability, crashes, or unexpected behavior on Linux systems using AMD graphics. It may lead to data corruption or denial of service if exploited.

Mitigation Strategies

Apply the latest kernel update from your distribution to patch this issue. If immediate patching is not possible, disable AMD display features or restrict access to affected systems until patched. Monitor vendor advisories for updates.

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