CVE-2026-68236

drm/amd/display: set new_stream to NULL after release

State: Published
Severity: 7.8 High
Published: Aug 10, 2026
Updated: Oct 19, 2026
Reserved: Jul 30, 2026

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)

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

CWE-415 Double Free

Affected Products

Product	Versions
LinuxLinux	9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before 92b7c6e3a1546c6db868b07e93fa6fb950d1d3a0Affected 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before bf9c06c70f496f1ba4474caf95c69696c828340eAffected 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before 01ba5b36898d6258f584269537cc49e7b05cf7c6Affected 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before ba8bf1dcbb44773e7a0fd13b42925c644e0d5e76Affected 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before 5182e442e61397d446c36995b8f5676942d35b82Affected 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before 679f23f0a3606afcef1ffabd72222f00a54ad9e3Affected 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before 0676fecbb5242aa22c057e78326d6d6041db034cAffected 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before 9fa26b9eed6195bf840f39ac183b9a6237548755Affected
LinuxLinux	4.15Affected before 4.15Not affected 5.10.271 through 5.10.Not affected 5.15.222 through 5.15.Not affected 6.1.189 through 6.1.Not affected 6.6.148 through 6.6.Not affected 6.12.101 through 6.12.Not affected 6.18.42 through 6.18.Not affected 7.1.6 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before 92b7c6e3a1546c6db868b07e93fa6fb950d1d3a0Affected
9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before bf9c06c70f496f1ba4474caf95c69696c828340eAffected
9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before 01ba5b36898d6258f584269537cc49e7b05cf7c6Affected
9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before ba8bf1dcbb44773e7a0fd13b42925c644e0d5e76Affected
9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before 5182e442e61397d446c36995b8f5676942d35b82Affected
9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before 679f23f0a3606afcef1ffabd72222f00a54ad9e3Affected
9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before 0676fecbb5242aa22c057e78326d6d6041db034cAffected
9b690ef3c70422cdcd0cf912db33f2c92ef4a53f to before 9fa26b9eed6195bf840f39ac183b9a6237548755Affected

LinuxLinux

4.15Affected
before 4.15Not affected
5.10.271 through 5.10.*Not affected
5.15.222 through 5.15.*Not affected
6.1.189 through 6.1.*Not affected
6.6.148 through 6.6.*Not affected
6.12.101 through 6.12.*Not affected
6.18.42 through 6.18.*Not affected
7.1.6 through 7.1.*Not affected
7.2 and laterNot affected

References

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