{"id":"CVE-2026-90341","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: coreboot: Validate table bounds\n\nThe existing coreboot_table_populate() bounds checks limit individual\nentries to the mapped length","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: coreboot: Validate table bounds\n\nThe existing coreboot_table_populate() bounds checks limit individual\nentries to the mapped length.  However, coreboot_table_…","severity":"high","cvss":7.7,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= d384d6f43d1ec3f1225ab0275fd592c5980bd830 < 3cca0d6dd4c2636d2514234233cb02db76621607","Linux >= d384d6f43d1ec3f1225ab0275fd592c5980bd830 < f79f621215a0944c4a0e1b3b86b99e433ae8c527","Linux >= d384d6f43d1ec3f1225ab0275fd592c5980bd830 < d848fac90c6f0566e7b93066b0b86024f65f395e","Linux >= d384d6f43d1ec3f1225ab0275fd592c5980bd830 < 88027241c1d2c3213bac937a1c2cb89a5775a413","Linux >= d384d6f43d1ec3f1225ab0275fd592c5980bd830 < fd93859ecfa5b6495a6863c18fd923a7666def26","Linux >= d384d6f43d1ec3f1225ab0275fd592c5980bd830 < 2d98a3b89394f283f054a4a54587c14ee89acaf9","Linux >= d384d6f43d1ec3f1225ab0275fd592c5980bd830 < e82f260a74dea8cdd7857f2cc66f73d0da522bb3","Linux >= d384d6f43d1ec3f1225ab0275fd592c5980bd830 < a58a57a1076f8c5dae0327e3710899478c3be901","Linux 4.12"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:17:54.583","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90341","references":[{"url":"https://git.kernel.org/stable/c/2d98a3b89394f283f054a4a54587c14ee89acaf9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3cca0d6dd4c2636d2514234233cb02db76621607","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/88027241c1d2c3213bac937a1c2cb89a5775a413","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a58a57a1076f8c5dae0327e3710899478c3be901","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d848fac90c6f0566e7b93066b0b86024f65f395e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e82f260a74dea8cdd7857f2cc66f73d0da522bb3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f79f621215a0944c4a0e1b3b86b99e433ae8c527","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fd93859ecfa5b6495a6863c18fd923a7666def26","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.0018,"epssPercentile":0.07824,"ingestedAt":"2026-09-17T16:21:47.818Z","slug":"CVE-2026-90341","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: coreboot: Validate table bounds\n\nThe existing coreboot_table_populate() bounds checks limit individual\nentries to the mapped length.  However, coreboot_table_probe() replaces\nthe platform resource length with header and table sizes supplied by\nfirmware before mapping the full table.\n\nA malformed table can overflow the 32-bit size addition or advertise an\nextent beyond the resource, causing the driver to map and parse memory\noutside the resource.  A resource shorter than the fixed header is also\nmapped as though it contained a complete header.\n\nReject resources shorter than the fixed header.  After validating the\nsignature, require a complete header, calculate the advertised extent\nwith overflow checking, and reject extents beyond the resource before\nremapping the table.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":42.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207265,"id":"CVE-2026-90341","ts":1789757340097,"field":"cvss","old":null,"new":"7.7"},{"seq":207264,"id":"CVE-2026-90341","ts":1789757340097,"field":"severity","old":"none","new":"high"}]}