CVE-2026-68236
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)
CSIRTS triage
- What
- The AMD display driver fails to null a pointer after releasing a stream, creating a use-after-free condition.
- Who is affected
- Linux systems with AMD GPUs using the display driver.
- Urgency
- Critical; CVSS 9.8 with use-after-free risk requires immediate patching.
- Action
- Update to a patched Linux kernel version containing the fix for CVE-2026-68236.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Advisory coverage (2)
- criticalCVE-2026-68236: drm/amd/display: set new_stream to NULL after releasemsrc · 2026-08-11
- highCVE-2026-68236: In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: set new_s…nvd · 2026-08-10
External references
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