CVE-2026-53068
HighCVSS 7.1Exploitation Probability (EPSS)
Low risk2th percentile — higher than 2% of all known CVEs
Summary
In the Linux kernel, a vulnerability was found in the komeda DRM driver where the AFBC framebuffer size validation did not check for integer overflow. Adding the AFBC payload size to the framebuffer offset could overflow, allowing the size check to pass incorrectly and accept an undersized GEM object. This could lead to out-of-bounds memory access.
Risk Assessment
The organization is at risk of potential data leakage or system crash due to a malformed AFBC framebuffer, enabling a local attacker to read or write beyond allocated memory boundaries.
Recommendation
Immediately update the Linux kernel to a version containing the fix that uses check_add_overflow() to safely compute the minimum buffer size. Check your distribution for the available patch.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: drm/komeda: fix integer overflow in AFBC framebuffer size check The AFBC framebuffer size validation calculates the minimum required buffer size by adding the AFBC payload size to the framebuffer offset. This addition is performed without checking for integer overflow. If the addition oveflows, the size check may incorrectly succed and allow userspace to provide an undersized drm_gem_object, potentially leading to out-of-bounds memory access. Add usage of check_add_overflow() to safely compute the minimum required size and reject the framebuffer if an overflow is detected. This makes the AFBC size validation more robust against malformed. Found by Linux Verification Center (linuxtesting.org) with SVACE.