264 lines
15 KiB
JSON
264 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-90341",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-11T19:38:34.804Z",
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"datePublished": "2026-09-17T16:08:52.307Z",
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"dateUpdated": "2026-10-19T09:01:58.280Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:01:58.280Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
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"baseScore": 7.7,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/firmware/google/coreboot_table.c"
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],
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"versions": [
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{
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"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830",
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"lessThan": "3cca0d6dd4c2636d2514234233cb02db76621607",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830",
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"lessThan": "f79f621215a0944c4a0e1b3b86b99e433ae8c527",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830",
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"lessThan": "d848fac90c6f0566e7b93066b0b86024f65f395e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830",
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"lessThan": "88027241c1d2c3213bac937a1c2cb89a5775a413",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830",
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"lessThan": "fd93859ecfa5b6495a6863c18fd923a7666def26",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830",
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"lessThan": "2d98a3b89394f283f054a4a54587c14ee89acaf9",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830",
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"lessThan": "e82f260a74dea8cdd7857f2cc66f73d0da522bb3",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "d384d6f43d1ec3f1225ab0275fd592c5980bd830",
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"lessThan": "a58a57a1076f8c5dae0327e3710899478c3be901",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/firmware/google/coreboot_table.c"
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],
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"versions": [
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{
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"version": "4.12",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.12",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.270",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.221",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.188",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.157",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.110",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.52",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.6",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.12",
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"versionEndExcluding": "5.10.270"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/3cca0d6dd4c2636d2514234233cb02db76621607"
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},
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{
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"url": "https://git.kernel.org/stable/c/f79f621215a0944c4a0e1b3b86b99e433ae8c527"
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},
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{
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"url": "https://git.kernel.org/stable/c/d848fac90c6f0566e7b93066b0b86024f65f395e"
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},
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{
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"url": "https://git.kernel.org/stable/c/88027241c1d2c3213bac937a1c2cb89a5775a413"
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},
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{
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"url": "https://git.kernel.org/stable/c/fd93859ecfa5b6495a6863c18fd923a7666def26"
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},
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{
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"url": "https://git.kernel.org/stable/c/2d98a3b89394f283f054a4a54587c14ee89acaf9"
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},
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{
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"url": "https://git.kernel.org/stable/c/e82f260a74dea8cdd7857f2cc66f73d0da522bb3"
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},
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{
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"url": "https://git.kernel.org/stable/c/a58a57a1076f8c5dae0327e3710899478c3be901"
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}
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],
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"title": "firmware: coreboot: Validate table bounds",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |