CVE-2026-74452

/// Technical description

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.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References