{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-97448", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T14:53:16.870Z", "datePublished": "2026-09-24T16:04:03.667Z", "dateUpdated": "2026-10-03T10:58:31.976Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-03T10:58:31.976Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Add validation for node in acpi_ns_build_normalized_path()\n\nAdd validation for node in acpi_ns_build_normalized_path()\nto prevent use-after-free vulnerabilities." } ], "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 stale node that acpi_ns_build_normalized_path() walks is produced while executing attacker-supplied DSDT/SSDT AML: acpi_bus_init()→acpi_load_tables()→acpi_tb_load_namespace()→acpi_ns_load_table()→acpi_ns_execute_table()→acpi_ps_parse_aml()→acpi_ds_terminate_control_method()→acpi_ex_stop_trace_method()→acpi_ns_get_normalized_pathname(); those table bytes come from platform firmware, not a network protocol.\nAC:L - ACPICA issue #1138 reproduces a deterministic heap-use-after-free: acpi_ps_parse_aml() frees a walk_state via acpi_ds_delete_walk_state(), then acpi_ds_terminate_control_method() calls acpi_ex_stop_trace_method() which always invokes acpi_ns_get_normalized_pathname() on method_desc->method.node; crafted AML (issue33.aml) makes that pointer alias the freed walk_state with no race.\nPR:N - acpi_bus_init() calls acpi_load_tables() at boot with no capable() or credential check, so module-level AML in a compromised DSDT/SSDT reaches acpi_ex_stop_trace_method()→acpi_ns_build_normalized_path() inside acpi_ns_execute_table() before any Linux account exists.\nUI:N - acpi_ns_execute_table() evaluates the DSDT/SSDT as a module-level method during acpi_load_tables() on ordinary power-on; the terminate-path UAF fires without a victim mount, sysfs open, or configfs SSDT write.\nS:U - The use-after-free is ACPI_MOVE_32_TO_32 of next_node->name inside a freed host-kernel acpi_walk_state in acpi_ns_build_normalized_path(); it does not cross a KVM/Xen, IOMMU, or sandbox boundary.\nC:H - acpi_ns_build_normalized_path() reads 4-byte namesegs and follows next_node->parent on the freed 1176-byte walk_state (ASAN: heap-use-after-free READ of size 4 at the ACPI_MOVE_32_TO_32 of next_node->name); after slab reuse that parent walk is an unbounded kernel-heap read, not a few header bytes.\nI:N - The UAF is a read of next_node->name and next_node->parent; ACPI_PATH_PUT8 only writes into the separately allocated pathname buffer from acpi_ns_get_normalized_pathname(), and acpi_ex_stop_trace_method() then ACPI_FREE()s that buffer, so there is no write through the freed walk_state.\nA:H - The reported AddressSanitizer heap-use-after-free in AcpiNsBuildNormalizedPath during AcpiLoadTables/acpi_ns_execute_table oopses the kernel at boot, and a cyclic parent pointer in the reclaimed walk_state can also hang the while (next_node && next_node != acpi_gbl_root_node) loop." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/acpi/acpica/nsnames.c" ], "versions": [ { "version": "d1e7ffe50ba588ddf7de520990815c37f31776d8", "lessThan": "087eed8b347e14864f8806fa1f5976c7dc2c6792", "status": "affected", "versionType": "git" }, { "version": "d1e7ffe50ba588ddf7de520990815c37f31776d8", "lessThan": "b06bb9b82c8f9a522dde213b1e0ddd535f22e3a2", "status": "affected", "versionType": "git" }, { "version": "d1e7ffe50ba588ddf7de520990815c37f31776d8", "lessThan": "90ebe7f8bb6ca1c6eadb16bed141ab8bb3dbab70", "status": "affected", "versionType": "git" }, { "version": "d1e7ffe50ba588ddf7de520990815c37f31776d8", "lessThan": "26dd27000e9540fcb594f15010b0696b03b0d240", "status": "affected", "versionType": "git" }, { "version": "d1e7ffe50ba588ddf7de520990815c37f31776d8", "lessThan": "babb146ceb79e71f328788f1e2c8c7c224026e61", "status": "affected", "versionType": "git" }, { "version": "d1e7ffe50ba588ddf7de520990815c37f31776d8", "lessThan": "21a73528579fcbd673b668bd27a05b658123bc1b", "status": "affected", "versionType": "git" }, { "version": "d1e7ffe50ba588ddf7de520990815c37f31776d8", "lessThan": "96b2b616870e46e2bc04efec03879683a0036e66", "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/nsnames.c" ], "versions": [ { "version": "4.3", "status": "affected" }, { "version": "0", "lessThan": "4.3", "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": "4.3", "versionEndExcluding": "5.10.271" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "5.15.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.12.111" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "6.18.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/087eed8b347e14864f8806fa1f5976c7dc2c6792" }, { "url": "https://git.kernel.org/stable/c/b06bb9b82c8f9a522dde213b1e0ddd535f22e3a2" }, { "url": "https://git.kernel.org/stable/c/90ebe7f8bb6ca1c6eadb16bed141ab8bb3dbab70" }, { "url": "https://git.kernel.org/stable/c/26dd27000e9540fcb594f15010b0696b03b0d240" }, { "url": "https://git.kernel.org/stable/c/babb146ceb79e71f328788f1e2c8c7c224026e61" }, { "url": "https://git.kernel.org/stable/c/21a73528579fcbd673b668bd27a05b658123bc1b" }, { "url": "https://git.kernel.org/stable/c/96b2b616870e46e2bc04efec03879683a0036e66" } ], "title": "ACPICA: Add validation for node in acpi_ns_build_normalized_path()", "x_generator": { "engine": "bippy-1.2.0" } } } }