CVE-2026-68236

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)

Affected Software

VendorProductVersion RangeStatus
LinuxLinux9b690ef3c70422cdcd0cf912db33f2c92ef4a53f < ba8bf1dcbb44773e7a0fd13b42925c644e0d5e76affected
LinuxLinux9b690ef3c70422cdcd0cf912db33f2c92ef4a53f < 5182e442e61397d446c36995b8f5676942d35b82affected
LinuxLinux9b690ef3c70422cdcd0cf912db33f2c92ef4a53f < 679f23f0a3606afcef1ffabd72222f00a54ad9e3affected
LinuxLinux9b690ef3c70422cdcd0cf912db33f2c92ef4a53f < 0676fecbb5242aa22c057e78326d6d6041db034caffected
LinuxLinux9b690ef3c70422cdcd0cf912db33f2c92ef4a53f < 9fa26b9eed6195bf840f39ac183b9a6237548755affected
LinuxLinux4.15affected
LinuxLinux0 < 4.15unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc4 <= *unaffected

Weaknesses

References