CVE-2026-90341firmware: coreboot: Validate table bounds

Official description

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.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/3cca0d6dd4c2636d2514234233cb02db76621607
• https://git.kernel.org/stable/c/f79f621215a0944c4a0e1b3b86b99e433ae8c527
• https://git.kernel.org/stable/c/d848fac90c6f0566e7b93066b0b86024f65f395e
• https://git.kernel.org/stable/c/88027241c1d2c3213bac937a1c2cb89a5775a413
• https://git.kernel.org/stable/c/fd93859ecfa5b6495a6863c18fd923a7666def26
• https://git.kernel.org/stable/c/2d98a3b89394f283f054a4a54587c14ee89acaf9
• https://git.kernel.org/stable/c/e82f260a74dea8cdd7857f2cc66f73d0da522bb3
• https://git.kernel.org/stable/c/a58a57a1076f8c5dae0327e3710899478c3be901