{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-97450", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T14:53:16.871Z", "datePublished": "2026-09-24T16:04:06.092Z", "dateUpdated": "2026-10-03T10:58:34.169Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-03T10:58:34.169Z" }, "descriptions": [ { "lang": "en", "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()." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "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()." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/acpi/acpica/evhandler.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7af2da201623ab5bc0773bd3eeb2f2345cfa1c4a", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9d9fbf6b895a23238e4a7b1a3230f648f0d952a1", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e98825650c2eb1605c707fd1391ceed65bb8e481", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "254e304f68dc079906ce2df4723548ffe35f682a", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "bfd981d35ed3156414fd35b4fe311d5d25cbfca6", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "4c977d57a784682dc8c6cce2f9253ef44ec28ae8", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c5296da2d516707862f8a2dbb4b515f777e5294f", "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/acpi/acpica/evhandler.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.271", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "2.6.12", "versionEndExcluding": "5.10.271" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.111" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.18.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/7af2da201623ab5bc0773bd3eeb2f2345cfa1c4a" }, { "url": "https://git.kernel.org/stable/c/9d9fbf6b895a23238e4a7b1a3230f648f0d952a1" }, { "url": "https://git.kernel.org/stable/c/e98825650c2eb1605c707fd1391ceed65bb8e481" }, { "url": "https://git.kernel.org/stable/c/254e304f68dc079906ce2df4723548ffe35f682a" }, { "url": "https://git.kernel.org/stable/c/bfd981d35ed3156414fd35b4fe311d5d25cbfca6" }, { "url": "https://git.kernel.org/stable/c/4c977d57a784682dc8c6cce2f9253ef44ec28ae8" }, { "url": "https://git.kernel.org/stable/c/c5296da2d516707862f8a2dbb4b515f777e5294f" } ], "title": "ACPICA: validate handler object type in two places", "x_generator": { "engine": "bippy-1.2.0" } } } }