CVE-2026-68108
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
In the Linux kernel, the amdgpu driver (VCE) fixed an integer overflow in image size calculation. Malicious VCE command streams with oversized dimensions (e.g., 65536×65536) caused the buffer size to wrap to 0, bypassing validation and allowing out-of-bounds memory access by GPU firmware. The fix uses 64-bit arithmetic and rejects invalid dimensions.
Risk Assessment
The vulnerability may allow unauthorized memory access by GPU firmware, potentially leading to privilege escalation or system integrity compromise.
Recommendation
Apply the Linux kernel update containing this commit to prevent integer overflow and related attacks.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vce: fix integer overflow in image size Fix a security vulnerability where malicious VCE command streams with oversized dimensions (e.g. 65536×65536) cause 32-bit integer overflow, wrapping the calculated buffer size to 0. This bypasses validation and allows GPU firmware to perform out-of-bound memory access. The fix uses 64-bit arithmetic to detect overflow and rejects invalid dimensions before they reach the hardware. V2: remove redundant check V3: modify max height value V4: remove size64 (cherry picked from commit cbe408dba581755ad1279a487ec786d8927d778d)