243 lines
13 KiB
JSON
243 lines
13 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-2026-97450",
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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": "2026-09-24T14:53:16.871Z",
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"datePublished": "2026-09-24T16:04:06.092Z",
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"dateUpdated": "2026-10-03T10:58:34.169Z"
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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": "2026-10-03T10:58:34.169Z"
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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\nACPICA: validate handler object type in two places\n\nACPICA: validate handler object type in acpi_ev_has_default_handler()\nand acpi_ev_find_region_handler()."
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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:H/A:H",
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"baseScore": 8.4,
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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 malformed AML that leaves a non-ACPI_TYPE_LOCAL_ADDRESS_HANDLER object as common_notify.handler arrives in a DSDT/SSDT. acpi_ev_find_region_handler() is reached from acpi_ev_install_space_handler() via acpi_install_address_space_handler(ACPI_ROOT_OBJECT) in ec_install_handlers()/acpi_ipmi_init(), and from acpi_ev_initialize_region() during acpi_tb_load_namespace(); no network message carries those bytes.\nAC:L - acpi_ev_install_space_handler() skips the DEVICE/PROCESSOR/THERMAL type check for acpi_gbl_root_node, so CopyObject of a Buffer onto `\\` makes obj_desc->common_notify.handler overlay Buffer.aml_start. A later handler install or OperationRegion init walks address_space.next on every run; the table author sets those objects and no race is required.\nPR:N - acpi_bus_init() calls acpi_load_tables() which executes module-level AML, then acpi_initialize_objects() → acpi_ev_initialize_op_regions() → acpi_ev_has_default_handler(acpi_gbl_root_node), and ec_install_handlers() calls acpi_install_address_space_handler(ACPI_ROOT_OBJECT) with no capable() check; a compromised DSDT/SSDT needs no Linux account.\nUI:N - Module-level AML runs in acpi_ns_execute_table() during acpi_load_tables(), and acpi_ev_find_region_handler() then runs from acpi_ev_initialize_op_regions() and from EC/IPMI/PCC handler install in boot/probe; that is ordinary power-on with no mount or file-open by a victim.\nS:U - The type-confused walk in acpi_ev_find_region_handler()/acpi_ev_has_default_handler() and the stores in acpi_ev_attach_region() stay inside the host ACPICA operand-object heap and do not cross a KVM/Xen, IOMMU, or sandbox boundary.\nC:H - Without the ACPI_TYPE_LOCAL_ADDRESS_HANDLER check, acpi_ev_find_region_handler() reads address_space.space_id and follows address_space.next from a wrong-typed operand (or from AML bytes overlaying common_notify.handler), an unbounded kernel overread of adjacent heap or attacker-chosen addresses rather than a few header bytes.\nI:H - acpi_ev_initialize_region() passes the type-confused pointer from acpi_ev_find_region_handler() to acpi_ev_attach_region(), which writes region_list and handler links through it; a matching fake space_id makes acpi_ev_address_space_dispatch() later invoke address_space.handler as a function pointer, which is type-confusion control-flow hijack.\nA:H - Walking address_space.next from a non-handler object (the ASAN global-buffer-overflow in AcpiEvFindRegionHandler on issue26.aml) dereferences an invalid pointer and oopses or panics the kernel during acpi_ev_install_space_handler() or acpi_ev_initialize_region()."
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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/acpi/acpica/evhandler.c"
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],
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"versions": [
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "7af2da201623ab5bc0773bd3eeb2f2345cfa1c4a",
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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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "9d9fbf6b895a23238e4a7b1a3230f648f0d952a1",
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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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "e98825650c2eb1605c707fd1391ceed65bb8e481",
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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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "254e304f68dc079906ce2df4723548ffe35f682a",
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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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "bfd981d35ed3156414fd35b4fe311d5d25cbfca6",
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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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "4c977d57a784682dc8c6cce2f9253ef44ec28ae8",
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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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "c5296da2d516707862f8a2dbb4b515f777e5294f",
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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/acpi/acpica/evhandler.c"
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],
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"versions": [
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{
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"version": "2.6.12",
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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": "2.6.12",
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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": "5.10.271",
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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": "5.15.222",
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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": "6.1.189",
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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": "6.6.158",
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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": "6.12.111",
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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": "6.18.53",
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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",
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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": "2.6.12",
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"versionEndExcluding": "5.10.271"
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},
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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": "2.6.12",
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"versionEndExcluding": "5.15.222"
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},
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.12",
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"versionEndExcluding": "7.2"
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/7af2da201623ab5bc0773bd3eeb2f2345cfa1c4a"
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},
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{
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"url": "https://git.kernel.org/stable/c/9d9fbf6b895a23238e4a7b1a3230f648f0d952a1"
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},
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{
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"url": "https://git.kernel.org/stable/c/e98825650c2eb1605c707fd1391ceed65bb8e481"
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},
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{
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"url": "https://git.kernel.org/stable/c/254e304f68dc079906ce2df4723548ffe35f682a"
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},
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{
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"url": "https://git.kernel.org/stable/c/bfd981d35ed3156414fd35b4fe311d5d25cbfca6"
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},
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{
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"url": "https://git.kernel.org/stable/c/4c977d57a784682dc8c6cce2f9253ef44ec28ae8"
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},
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{
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"url": "https://git.kernel.org/stable/c/c5296da2d516707862f8a2dbb4b515f777e5294f"
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}
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],
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"title": "ACPICA: validate handler object type in two places",
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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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} |