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

Summary

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)

Timeline

1. Aug 10, 2026, 12:01 PM UTCCVE published
2. Oct 16, 2026, 3:46 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Oct 19, 2026, 8:58 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f · fixed in 92b7c6e3a1546c6db868b07e93fa6fb950d1d3a0; From 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f · fixed in bf9c06c70f496f1ba4474caf95c69696c828340e; From 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f · fixed in 01ba5b36898d6258f584269537cc49e7b05cf7c6; From 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f · fixed in ba8bf1dcbb44773e7a0fd13b42925c644e0d5e76; From 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f · fixed in 5182e442e61397d446c36995b8f5676942d35b82; From 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f · fixed in 679f23f0a3606afcef1ffabd72222f00a54ad9e3; From 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f · fixed in 0676fecbb5242aa22c057e78326d6d6041db034c; From 9b690ef3c70422cdcd0cf912db33f2c92ef4a53f · fixed in 9fa26b9eed6195bf840f39ac183b9a6237548755

• Linux Linux

  4.15

• KernelLinux

  From 4.15.0 · fixed in 5.10.271; From 5.11.0 · fixed in 5.15.222; From 5.16.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.148; From 6.7.0 · fixed in 6.12.101; From 6.13.0 · fixed in 6.18.42; From 6.19.0 · fixed in 7.1.6

References 8