CVE-2026-68303
In the Linux kernel, the following vulnerability has been resolved:
drm/vc4: hvs/v3d: Fix null dereference in unbind
The hvs and v3d drivers use dev_get_drvdata(master) in their unbind
functions. Since the vc4-drm gets removed before its dependent drivers
(vc4_hvs/vc4_v3d) the vc4_hvs_unbind/vc4_v3d_unbind functions try to
get drvdata of its master and fails with a null dereference error.
Use the data pointer passed to the unbind functions directly instead of
dev_get_drvdata(master). This avoids using potentially freed memory.
CSIRTS triage
- What
- A null pointer dereference occurs in the drm/vc4 hvs/v3d driver during device unbind.
- Who is affected
- Systems running Linux kernel with VideoCore IV graphics driver loaded.
- Urgency
- Medium priority; CVSS 5.5, potential crash on device unbind.
- Action
- Apply kernel patch adding null pointer check in the unbind path.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.19% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 9% of all EPSS-scored CVEs.
Advisory coverage (2)
- mediumCVE-2026-68303: drm/vc4: hvs/v3d: Fix null dereference in unbindmsrc · 2026-08-11
- unknownCVE-2026-68303: In the Linux kernel, the following vulnerability has been resolved: drm/vc4: hvs/v3d: Fix null…nvd · 2026-08-10
External references
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