CVE-2026-90341

firmware: coreboot: Validate table bounds

State: Published
Severity: 7.7 High
Published: Sep 17, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.7 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before 3cca0d6dd4c2636d2514234233cb02db76621607Affected d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before f79f621215a0944c4a0e1b3b86b99e433ae8c527Affected d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before d848fac90c6f0566e7b93066b0b86024f65f395eAffected d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before 88027241c1d2c3213bac937a1c2cb89a5775a413Affected d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before fd93859ecfa5b6495a6863c18fd923a7666def26Affected d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before 2d98a3b89394f283f054a4a54587c14ee89acaf9Affected d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before e82f260a74dea8cdd7857f2cc66f73d0da522bb3Affected d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before a58a57a1076f8c5dae0327e3710899478c3be901Affected
LinuxLinux	4.12Affected before 4.12Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before 3cca0d6dd4c2636d2514234233cb02db76621607Affected
d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before f79f621215a0944c4a0e1b3b86b99e433ae8c527Affected
d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before d848fac90c6f0566e7b93066b0b86024f65f395eAffected
d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before 88027241c1d2c3213bac937a1c2cb89a5775a413Affected
d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before fd93859ecfa5b6495a6863c18fd923a7666def26Affected
d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before 2d98a3b89394f283f054a4a54587c14ee89acaf9Affected
d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before e82f260a74dea8cdd7857f2cc66f73d0da522bb3Affected
d384d6f43d1ec3f1225ab0275fd592c5980bd830 to before a58a57a1076f8c5dae0327e3710899478c3be901Affected

LinuxLinux

4.12Affected
before 4.12Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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