CVE-2026-90341

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90341", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.804Z", "datePublished": "2026-09-17T16:08:52.307Z", "dateUpdated": "2026-10-19T09:01:58.280Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:01:58.280Z"}, "descriptions": [{"lang": "en", "value": "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_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."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.7, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The triggering fields are header->header_bytes and header->table_bytes in the LBIO table, read by coreboot_table_probe() after platform_get_resource(pdev, IORESOURCE_MEM, 0) from ACPI GOOGCB00/BOOT0000 _CRS or the OF /firmware/coreboot reg; those bytes come from firmware, not a network protocol message.\nAC:L - coreboot_table_probe() replaces resource_size(res) with the u32 sum header_bytes+table_bytes before memremap() and coreboot_table_populate(); firmware that sets that sum past the ACPI/DT window, or a resource shorter than sizeof(*header), hits the over-map on every bind with no race.\nPR:N - coreboot_table_probe() is the coreboot_table platform_driver probe from subsys_initcall, with no capable() or credential check; a malformed LBIO header at the GOOGCB00/coreboot MEM resource is parsed automatically, so no Linux account or user-namespace capability is required.\nUI:N - Binding the GOOGCB00/BOOT0000 or compatible=\"coreboot\" platform device calls coreboot_table_probe() during boot or module load; the oversized memremap() happens on that probe with no mount, open, or other victim action.\nS:U - The oversized memremap() in coreboot_table_probe() and the memcpy() in coreboot_table_populate() stay in this kernel's coreboot table parser; this is not a KVM/Xen guest-to-host, IOMMU, or sandbox boundary crossing.\nC:H - memremap(res->start, header_bytes+table_bytes) then coreboot_table_populate() memcpy's each entry->size from that mapping into a kmalloc'd coreboot_device; table_bytes is an unconstrained u32, so this is an unbounded over-read of physical memory past the ACPI/DT resource, not a few-byte leak.\nI:N - coreboot_table_populate() copies into kzalloc(sizeof(device->dev)+entry->size) using the same entry->size already checked against the (oversize) mapping, so the destination matches the copy; this path has no out-of-bounds write or control-flow hijack primitive.\nA:H - try_ram_remap() in memremap() returns __va(res->start) after checking only the first pfn, so populate's walk of a table_bytes that extends past the reserved coreboot table/CBMEM window can fault on a linear-map hole or mixed RAM/MMIO range and oops or panic."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/firmware/google/coreboot_table.c"], "versions": [{"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "lessThan": "3cca0d6dd4c2636d2514234233cb02db76621607", "status": "affected", "versionType": "git"}, {"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "lessThan": "f79f621215a0944c4a0e1b3b86b99e433ae8c527", "status": "affected", "versionType": "git"}, {"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "lessThan": "d848fac90c6f0566e7b93066b0b86024f65f395e", "status": "affected", "versionType": "git"}, {"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "lessThan": "88027241c1d2c3213bac937a1c2cb89a5775a413", "status": "affected", "versionType": "git"}, {"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "lessThan": "fd93859ecfa5b6495a6863c18fd923a7666def26", "status": "affected", "versionType": "git"}, {"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "lessThan": "2d98a3b89394f283f054a4a54587c14ee89acaf9", "status": "affected", "versionType": "git"}, {"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "lessThan": "e82f260a74dea8cdd7857f2cc66f73d0da522bb3", "status": "affected", "versionType": "git"}, {"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "lessThan": "a58a57a1076f8c5dae0327e3710899478c3be901", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/firmware/google/coreboot_table.c"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3cca0d6dd4c2636d2514234233cb02db76621607"}, {"url": "https://git.kernel.org/stable/c/f79f621215a0944c4a0e1b3b86b99e433ae8c527"}, {"url": "https://git.kernel.org/stable/c/d848fac90c6f0566e7b93066b0b86024f65f395e"}, {"url": "https://git.kernel.org/stable/c/88027241c1d2c3213bac937a1c2cb89a5775a413"}, {"url": "https://git.kernel.org/stable/c/fd93859ecfa5b6495a6863c18fd923a7666def26"}, {"url": "https://git.kernel.org/stable/c/2d98a3b89394f283f054a4a54587c14ee89acaf9"}, {"url": "https://git.kernel.org/stable/c/e82f260a74dea8cdd7857f2cc66f73d0da522bb3"}, {"url": "https://git.kernel.org/stable/c/a58a57a1076f8c5dae0327e3710899478c3be901"}], "title": "firmware: coreboot: Validate table bounds", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/firmware/google/coreboot_table.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "3cca0d6dd4c2636d2514234233cb02db76621607", "status": "affected", "version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "versionType": "git"}, {"lessThan": "f79f621215a0944c4a0e1b3b86b99e433ae8c527", "status": "affected", "version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "versionType": "git"}, {"lessThan": "d848fac90c6f0566e7b93066b0b86024f65f395e", "status": "affected", "version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "versionType": "git"}, {"lessThan": "88027241c1d2c3213bac937a1c2cb89a5775a413", "status": "affected", "version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "versionType": "git"}, {"lessThan": "fd93859ecfa5b6495a6863c18fd923a7666def26", "status": "affected", "version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "versionType": "git"}, {"lessThan": "2d98a3b89394f283f054a4a54587c14ee89acaf9", "status": "affected", "version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "versionType": "git"}, {"lessThan": "e82f260a74dea8cdd7857f2cc66f73d0da522bb3", "status": "affected", "version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "versionType": "git"}, {"lessThan": "a58a57a1076f8c5dae0327e3710899478c3be901", "status": "affected", "version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/firmware/google/coreboot_table.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.12"}, {"lessThan": "4.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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_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."}], "id": "CVE-2026-90341", "lastModified": "2026-10-19T09:19:28.117", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-17T17:17:32.740", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2d98a3b89394f283f054a4a54587c14ee89acaf9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3cca0d6dd4c2636d2514234233cb02db76621607"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/88027241c1d2c3213bac937a1c2cb89a5775a413"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a58a57a1076f8c5dae0327e3710899478c3be901"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d848fac90c6f0566e7b93066b0b86024f65f395e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e82f260a74dea8cdd7857f2cc66f73d0da522bb3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f79f621215a0944c4a0e1b3b86b99e433ae8c527"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fd93859ecfa5b6495a6863c18fd923a7666def26"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d384d6f43d1ec3f1225ab0275fd592c5980bd830,3cca0d6dd4c2636d2514234233cb02db76621607)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d384d6f43d1ec3f1225ab0275fd592c5980bd830,f79f621215a0944c4a0e1b3b86b99e433ae8c527)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d384d6f43d1ec3f1225ab0275fd592c5980bd830,d848fac90c6f0566e7b93066b0b86024f65f395e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d384d6f43d1ec3f1225ab0275fd592c5980bd830,88027241c1d2c3213bac937a1c2cb89a5775a413)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d384d6f43d1ec3f1225ab0275fd592c5980bd830,fd93859ecfa5b6495a6863c18fd923a7666def26)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d384d6f43d1ec3f1225ab0275fd592c5980bd830,2d98a3b89394f283f054a4a54587c14ee89acaf9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d384d6f43d1ec3f1225ab0275fd592c5980bd830,e82f260a74dea8cdd7857f2cc66f73d0da522bb3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d384d6f43d1ec3f1225ab0275fd592c5980bd830,a58a57a1076f8c5dae0327e3710899478c3be901)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.270,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.221,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.188,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.157,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.110,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.52,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.6,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-19T13:00:11.595698+00:00", "updated": "2026-09-19T15:45:16.349038+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-119", "CWE-20"]}