{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-97445", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T14:53:16.870Z", "datePublished": "2026-09-24T16:04:00.409Z", "dateUpdated": "2026-10-03T10:58:29.784Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-03T10:58:29.784Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Enhance buffer validation in acpi_ut_walk_aml_resources()\n\nEnhance buffer validation in acpi_ut_walk_aml_resources() to prevent\nbuffer overflows." } ], "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 - Malformed AML resource bytes arrive in a Buffer from DSDT/SSDT, not a network message. acpi_ut_walk_aml_resources() is reached from acpi_ex_concat_template() during acpi_bus_init→acpi_load_tables→acpi_ns_load_table (ConcatenateResTemplate) and from acpi_rs_create_resource_list() via acpi_dev_get_resources() on _CRS; both are local firmware paths.\nAC:L - A Buffer whose remaining length is below sizeof(aml_resource_end_tag), a large descriptor shorter than the serial_bus.type field, or a 16-bit Resource Length larger than end_aml-aml makes acpi_ut_validate_resource() and acpi_rs_convert_aml_to_resources() over-read on every walk; the table author sets those bytes and no race is required.\nPR:N - acpi_bus_init() calls acpi_load_tables() which executes module-level ConcatenateResTemplate, and acpi_dev_get_resources() walks _CRS during scan, neither with a uid or capability check; a compromised DSDT/SSDT is enough with no local account.\nUI:N - acpi_ns_execute_table() evaluates module-level AML during acpi_load_tables(), and acpi_scan_claim_resources()/acpi_dev_get_resources() walk _CRS while claiming device resources; both run on ordinary power-on with no mount, file-open, or other victim action.\nS:U - The over-read is of kernel heap adjacent to the ACPI Buffer object's payload (acpi_ut_create_buffer_object) inside the host ACPICA interpreter; it does not cross a KVM/Xen, IOMMU, or sandbox boundary.\nC:H - Without the length>(end_aml-aml) check, a large vendor/GPIO/serial descriptor whose 16-bit Resource Length exceeds the remaining Buffer lets acpi_rs_convert_aml_to_resource() ACPI_RSC_MOVE*/COUNT16 copy up to that claimed length from past the heap allocation, an unbounded kernel overread rather than a few header bytes.\nI:N - AddressSanitizer and the patch comments describe a READ past the AML Buffer; acpi_ut_walk_aml_resources() only validates and optionally converts into a separately sized resource list, and ConcatenateResTemplate (user_function NULL) never stores through the over-read pointer, so there is no out-of-bounds write primitive.\nA:H - acpi_ut_validate_resource() reading common_serial_bus.type or acpi_rs_move_data() copying a claimed Resource Length past the Buffer object walks off the slab allocation and can oops/panic, matching the reported KASAN heap-buffer-overflow in AcpiUtValidateResource on the ConcatenateResTemplate path." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/acpi/acpica/utresrc.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "816badec122fe01d05265f2d306212739f5d3fdb", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "cd60a407a3a6d75347a04f9271b7b561d06d21c8", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "37c794f87a72471f7ef71633ac0550ad14ac0885", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "50a11e2f3dc8a7189e7ebbd3eeafa51f16128a56", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "f65e2ef7ccca11dc874f48aff996a6a26528f8e7", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d0fb1973f705c8b8bd7e118e4a9a65d05d800fba", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b2e21fe8c3361c3d0d57ee56d359bea9b51fda3d", "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/utresrc.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/816badec122fe01d05265f2d306212739f5d3fdb" }, { "url": "https://git.kernel.org/stable/c/cd60a407a3a6d75347a04f9271b7b561d06d21c8" }, { "url": "https://git.kernel.org/stable/c/37c794f87a72471f7ef71633ac0550ad14ac0885" }, { "url": "https://git.kernel.org/stable/c/50a11e2f3dc8a7189e7ebbd3eeafa51f16128a56" }, { "url": "https://git.kernel.org/stable/c/f65e2ef7ccca11dc874f48aff996a6a26528f8e7" }, { "url": "https://git.kernel.org/stable/c/d0fb1973f705c8b8bd7e118e4a9a65d05d800fba" }, { "url": "https://git.kernel.org/stable/c/b2e21fe8c3361c3d0d57ee56d359bea9b51fda3d" } ], "title": "ACPICA: Enhance buffer validation in acpi_ut_walk_aml_resources()", "x_generator": { "engine": "bippy-1.2.0" } } } }