{"api_version":"1","generated_at":"2026-10-01T10:27:32+00:00","cve":"CVE-2026-97452","urls":{"html":"https://cve.report/CVE-2026-97452","api":"https://cve.report/api/cve/CVE-2026-97452.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-97452","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-97452"},"summary":{"title":"ACPICA: Prevent adding invalid references","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Prevent adding invalid references\n\nPrevent adding references for local, argument, and debug objects\nin acpi_ut_copy_simple_object().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-24 17:17:23","updated_at":"2026-09-28 06:16:32"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"8.4","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.4","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":8.4,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/6e8c55e13a5e3a9f38921d62924f18ceba3330eb","name":"https://git.kernel.org/stable/c/6e8c55e13a5e3a9f38921d62924f18ceba3330eb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a6cd2fc2d5429a5b7d5a8b9ba0e6663e8ccbc9ba","name":"https://git.kernel.org/stable/c/a6cd2fc2d5429a5b7d5a8b9ba0e6663e8ccbc9ba","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e16d1e5fcb17dfc369e20095f8cf5e841101279e","name":"https://git.kernel.org/stable/c/e16d1e5fcb17dfc369e20095f8cf5e841101279e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97452","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97452","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 e16d1e5fcb17dfc369e20095f8cf5e841101279e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 a6cd2fc2d5429a5b7d5a8b9ba0e6663e8ccbc9ba git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 6e8c55e13a5e3a9f38921d62924f18ceba3330eb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.12","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.12 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00:11:23"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/acpi/acpica/utcopy.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e16d1e5fcb17dfc369e20095f8cf5e841101279e","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"a6cd2fc2d5429a5b7d5a8b9ba0e6663e8ccbc9ba","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"6e8c55e13a5e3a9f38921d62924f18ceba3330eb","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/acpi/acpica/utcopy.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.12"},{"lessThan":"2.6.12","status":"unaffected","version":"0","versionType":"semver"},{"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"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.111","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"2.6.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Prevent adding invalid references\n\nPrevent adding references for local, argument, and debug objects\nin acpi_ut_copy_simple_object()."}],"metrics":[{"cvssV3_1":{"baseScore":8.4,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The attacker-controlled AML is a CopyObject of a Package whose elements are Local/Arg/Debug references, carried in a DSDT/SSDT rather than a network message. The patched acpi_ut_copy_simple_object() is reached from acpi_ex_opcode_1A_1T_1R(AML_COPY_OBJECT_OP) during acpi_bus_init→acpi_load_tables→acpi_tb_load_namespace→acpi_ns_load_table→acpi_ns_execute_table.\nAC:L - acpi_ds_init_object_from_op() sets a Local/Arg reference.object to &walk_state->local_variables[i]/arguments[i]; after that method returns, acpi_ps_parse_aml() calls acpi_ds_delete_walk_state(). A later module-level CopyObject of the surviving package always UAF-reads that freed node in acpi_ut_add_reference(); the AML author sequences both sides with no race.\nPR:N - acpi_bus_init() calls acpi_load_tables() which runs module-level CopyObject via acpi_ns_execute_table() with no uid or capable() check; a DSDT/SSDT that stores Package(){Local0} from a nested method then CopyObject's it triggers the UAF at boot without a Linux account or configfs SSDT load.\nUI:N - acpi_ns_execute_table() evaluates the table's module-level AML, including the nested method that plants the Local/Arg refs and the subsequent CopyObject, during acpi_load_tables() at ordinary power-on; no mount, file-open, or other victim action is required.\nS:U - The UAF is of the kmalloc'd struct acpi_walk_state (its local_variables/arguments pseudo-nodes) inside the host ACPICA interpreter after acpi_ds_delete_walk_state(); it does not cross a KVM/Xen, IOMMU, or sandbox boundary.\nC:H - acpi_ut_valid_internal_object() reads descriptor_type from the freed walk_state (the reported 1-byte KASAN UAF at the CopyObject copy). Reclaiming that slab as a fake ACPI_DESC_TYPE_OPERAND lets acpi_ut_update_object_reference walk attacker-chosen nested pointers, a UAF read primitive.\nI:H - If the freed walk_state is sprayed as a valid operand, acpi_ut_copy_simple_object()'s acpi_ut_add_reference() calls acpi_ut_update_object_reference(REF_INCREMENT) on attacker-controlled type and nested pointers, a UAF write/refcount-increment primitive; memcpy also plants the dangling pointer into the dest copy.\nA:H - The KASAN report is a heap-use-after-free in acpi_ut_valid_internal_object() on the CopyObject path after acpi_ds_delete_walk_state(); using that dangling Local/Arg node pointer oopses/panics, and any UAF is Availability High."}]}],"providerMetadata":{"dateUpdated":"2026-09-28T05:29:54.397Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/e16d1e5fcb17dfc369e20095f8cf5e841101279e"},{"url":"https://git.kernel.org/stable/c/a6cd2fc2d5429a5b7d5a8b9ba0e6663e8ccbc9ba"},{"url":"https://git.kernel.org/stable/c/6e8c55e13a5e3a9f38921d62924f18ceba3330eb"}],"title":"ACPICA: Prevent adding invalid references","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-97452","datePublished":"2026-09-24T16:04:08.401Z","dateReserved":"2026-09-24T14:53:16.871Z","dateUpdated":"2026-09-28T05:29:54.397Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-24 17:17:23","lastModifiedDate":"2026-09-28 06:16:32","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.5,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"97452","Ordinal":"1","Title":"ACPICA: Prevent adding invalid references","CVE":"CVE-2026-97452","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"97452","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Prevent adding invalid references\n\nPrevent adding references for local, argument, and debug objects\nin acpi_ut_copy_simple_object().","Type":"Description","Title":"ACPICA: Prevent adding invalid references"}]}}}