CVE-2026-74452
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk4th percentile - higher than 4% of all known CVEs
Summary
In the Linux kernel, the drm/panthor graphics driver added rejection of firmware sections with oversized data. Previously, the data size to copy was not validated against the allocated section size, which could lead to heap buffer overflow and massive out-of-bounds zeroing of kernel memory.
Risk Assessment
Heap buffer overflow and massive memory zeroing can lead to memory corruption, system crashes, or privilege escalation via malicious firmware.
Recommendation
Apply the kernel patch that rejects section entries whose initial data is larger than the section size.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: drm/panthor: reject firmware sections with oversized data In panthor_fw_load_section_entry(), the data size to copy is calculated without validating it against the allocated section_size: section->data.size = hdr.data.end - hdr.data.start; If a crafted firmware sets data.size larger than the allocated memory, this could cause a heap buffer overflow in panthor_fw_init_section_mem() memcpy(section->mem->kmap, section->data.buf, section->data.size); Additionally, if the section->data.size exceeds the BO size, could this memset underflow the size calculation, leading to a massive out-of-bounds zeroing of kernel memory? memset(section->mem->kmap + section->data.size, 0, panthor_kernel_bo_size(section->mem) - section->data.size); Reject section entries whose initial data is larger than the section size.