{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-97452","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-24T14:53:16.871Z","datePublished":"2026-09-24T16:04:08.401Z","dateUpdated":"2026-10-03T10:58:36.364Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-03T10:58:36.364Z"},"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":{"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 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."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/acpi/acpica/utcopy.c"],"versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"2350a6f89eca45f9219f37b331e4083f96299996","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"61cb905c33d0e0c6ff3c9c90fb269331bce8c2c0","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"d239ccf5069f892cc36b9befafda030b3ca789e6","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"c2cf936b07b0a298637e56e53ef043c7ff8eee31","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"e16d1e5fcb17dfc369e20095f8cf5e841101279e","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"a6cd2fc2d5429a5b7d5a8b9ba0e6663e8ccbc9ba","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"6e8c55e13a5e3a9f38921d62924f18ceba3330eb","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/utcopy.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/2350a6f89eca45f9219f37b331e4083f96299996"},{"url":"https://git.kernel.org/stable/c/61cb905c33d0e0c6ff3c9c90fb269331bce8c2c0"},{"url":"https://git.kernel.org/stable/c/d239ccf5069f892cc36b9befafda030b3ca789e6"},{"url":"https://git.kernel.org/stable/c/c2cf936b07b0a298637e56e53ef043c7ff8eee31"},{"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"}}}}