{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97455", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T14:53:16.871Z", "datePublished": "2026-09-24T16:04:11.922Z", "dateUpdated": "2026-09-25T05:10:47.616Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-25T05:10:47.616Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Fix use-after-free in acpi_ds_terminate_control_method()\n\nFix use-after-free issue in acpi_ds_terminate_control_method() by\nclearing references to method locals and arguments."}], "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 data that becomes walk_state->return_desc is AML RefOf(Local/Arg) in the platform DSDT/SSDT. acpi_ex_get_object_reference builds that ACPI_REFCLASS_REFOF; acpi_ps_parse_aml then calls the patched acpi_ds_terminate_control_method from acpi_ns_execute_table (acpi_load_tables) or acpi_ps_execute_method (acpi_evaluate_object). Those tables are local firmware, not a network protocol message.\nAC:L - The table author emits Return(RefOf(LocalN)) or Return(RefOf(ArgN)); acpi_ex_get_object_reference sets reference.object to &walk_state->local_variables[i] or &walk_state->arguments[i]. acpi_ds_terminate_control_method then acpi_ds_method_data_delete_all, acpi_ps_parse_aml still forwards return_desc, and acpi_ds_delete_walk_state frees the node. That sequence is deterministic with no race.\nPR:N - acpi_bus_init calls acpi_load_tables \u2192 acpi_tb_load_namespace \u2192 acpi_ns_load_table \u2192 acpi_ns_execute_table with no uid or capability check. Module-level AML that invokes a nested method returning RefOf(Local/Arg), with the caller Store/DerefOf using that value, hits acpi_ds_terminate_control_method at boot before any account exists.\nUI:N - acpi_ns_execute_table runs that nested Return(RefOf(Local/Arg)) automatically during acpi_load_tables in acpi_bus_init at power-on; the victim does not mount media, open a file, or otherwise interact.\nS:U - The dangling ACPI_REFCLASS_REFOF points at the embedded local_variables[]/arguments[] acpi_namespace_node inside the kmalloc'd acpi_walk_state freed by acpi_ds_delete_walk_state; that is host ACPICA heap corruption, not a KVM/Xen, IOMMU, or sandbox crossing.\nC:H - After acpi_ds_delete_walk_state, acpi_ns_resolve_references reads node->object from the freed local/arg pseudo-node, and a parent DerefOf uses operand[0]->reference.object the same way; that use-after-free of the walk_state slab is an arbitrary kernel-memory read, not a few-byte leak.\nI:H - A parent Store to the returned RefOf calls acpi_ex_store_object_to_node on the dangling node, and acpi_ns_resolve_references does acpi_ut_add_reference on node->object taken from freed walk_state memory; spraying that slab yields a write/refcount primitive and control-flow hijack.\nA:H - acpi_ds_delete_walk_state frees the walk_state while return_desc still aliases its local_variables[]/arguments[] nodes; later ns_resolve_references or DerefOf/Store through that pointer oopses or panics, and any use-after-free is Availability High."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/acpi/acpica/dsmethod.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "fe7b3d3b7490c2c0119f2d84fa33996dcbc71042", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ef5a8d939c1e5b36e75450bbb5b6348faff4dcf3", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "945e87267cfd90937b3c637f87324cbb56998b72", "status": "affected", "versionType": "git"}, {"version": "0", "lessThan": "6.12.111", "status": "affected", "versionType": "semver"}, {"version": "0", "lessThan": "6.18.53", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/acpi/acpica/dsmethod.c"], "versions": [{"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:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/fe7b3d3b7490c2c0119f2d84fa33996dcbc71042"}, {"url": "https://git.kernel.org/stable/c/ef5a8d939c1e5b36e75450bbb5b6348faff4dcf3"}, {"url": "https://git.kernel.org/stable/c/945e87267cfd90937b3c637f87324cbb56998b72"}], "title": "ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/acpi/acpica/dsmethod.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "fe7b3d3b7490c2c0119f2d84fa33996dcbc71042", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "ef5a8d939c1e5b36e75450bbb5b6348faff4dcf3", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "945e87267cfd90937b3c637f87324cbb56998b72", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "6.12.111", "status": "affected", "version": "0", "versionType": "semver"}, {"lessThan": "6.18.53", "status": "affected", "version": "0", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/acpi/acpica/dsmethod.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Fix use-after-free in acpi_ds_terminate_control_method()\n\nFix use-after-free issue in acpi_ds_terminate_control_method() by\nclearing references to method locals and arguments."}], "id": "CVE-2026-97455", "lastModified": "2026-09-25T05:17:06.673", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-24T17:17:23.957", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/945e87267cfd90937b3c637f87324cbb56998b72"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ef5a8d939c1e5b36e75450bbb5b6348faff4dcf3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fe7b3d3b7490c2c0119f2d84fa33996dcbc71042"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,fe7b3d3b7490c2c0119f2d84fa33996dcbc71042)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,ef5a8d939c1e5b36e75450bbb5b6348faff4dcf3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,945e87267cfd90937b3c637f87324cbb56998b72)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.111)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.53)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.111,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-24T23:45:07.195540+00:00", "updated": "2026-09-25T10:00:16.359664+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}