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CVE-2026-90341

HIGHCVSS 7.7/10EPSS 0.19%

Last modified

CVE-2026-90341 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. 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. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.7/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS Probability
0.19%

8.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= d384d6f43d1ec3f1225ab0275fd592c5980bd830, < 3cca0d6dd4c2636d2514234233cb02db76621607; >= d384d6f43d1ec3f1225ab0275fd592c5980bd830, < f79f621215a0944c4a0e1b3b86b99e433ae8c527; >= d384d6f43d1ec3f1225ab0275fd592c5980bd830, < d848fac90c6f0566e7b93066b0b86024f65f395e; >= d384d6f43d1ec3f1225ab0275fd592c5980bd830, < 88027241c1d2c3213bac937a1c2cb89a5775a413; >= d384d6f43d1ec3f1225ab0275fd592c5980bd830, < fd93859ecfa5b6495a6863c18fd923a7666def26; >= d384d6f43d1ec3f1225ab0275fd592c5980bd830, < 2d98a3b89394f283f054a4a54587c14ee89acaf9; >= d384d6f43d1ec3f1225ab0275fd592c5980bd830, < e82f260a74dea8cdd7857f2cc66f73d0da522bb3; >= d384d6f43d1ec3f1225ab0275fd592c5980bd830, < a58a57a1076f8c5dae0327e3710899478c3be901
LinuxLinux4.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-90341?
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.
How severe is CVE-2026-90341?
CVE-2026-90341 has a CVSS score of 7.7/10 (HIGH severity). The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.
How do I fix CVE-2026-90341?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST