In the Linux kernel, the following vulnerability has been resolved: firmware: coreboot: Validate table bounds The existing coreboot_table_

In the Linux kernel, the following vulnerability has been resolved:

firmware: coreboot: Validate table bounds

The existing coreboot_table_populate() bounds checks limit individual
entries to the mapped length. However, coreboot_table_probe() replaces
the platform resource length with header and table sizes supplied by
firmware before mapping the full table.

A malformed table can overflow the 32-bit size addition or advertise an
extent beyond the resource, causing the driver to map and parse memory
outside the resource. A resource shorter than the fixed header is also
mapped as though it contained a complete header.

Reject resources shorter than the fixed header. After validating the
signature, require a complete header, calculate the advertised extent
with overflow checking, and reject extents beyond the resource before
remapping the table.