{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-97451","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-24T14:53:16.871Z","datePublished":"2026-09-24T16:04:07.520Z","dateUpdated":"2026-10-03T10:58:35.249Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-03T10:58:35.249Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)\n\nAdd overflow check for Index + Length to prevent integer overflow\nwhen calculating the truncation length. This prevents negative\nsize parameter being passed to memcpy()."}],"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 wrapping Index and Length are AML integer operands of Mid() in acpi_ex_opcode_3A_1T_1R(), taken from the local DSDT/SSDT. The path is acpi_bus_init() → acpi_load_tables() → acpi_tb_load_namespace() → acpi_ns_load_table() → acpi_ns_execute_table() → acpi_ds_exec_end_op(); no network protocol carries those integers.\nAC:L - A Mid() whose Index is in [1, Source.length) and Length is Ones (UINT64_MAX) makes (index+length) wrap so truncation is skipped; the STRING path then kzalloc(length+1)==kzalloc(0) and memcpy(..., length) on every acpi_ns_execute_table() of that table. The table author sets those operands; no race.\nPR:N - acpi_bus_init() calls acpi_load_tables(), which runs module-level Mid() in acpi_ns_execute_table() with no capable() or uid check. A compromised DSDT/SSDT is enough; no Linux account, user namespace, or /sys/kernel/config/acpi/table write is required.\nUI:N - acpi_ns_execute_table() evaluates definition-block AML, including a module-level Mid(), automatically during acpi_load_tables() at boot. No mount, file-open, or other victim action is required at trigger time.\nS:U - The overflowing memcpy in acpi_ex_opcode_3A_1T_1R() corrupts the host kernel heap around the Mid() result object from ACPI_ALLOCATE_ZEROED; it does not cross a KVM/Xen, IOMMU, or sandbox boundary.\nC:H - After the wrap, memcpy() in acpi_ex_opcode_3A_1T_1R() reads the untruncated length (UINT64_MAX) bytes from operand[0]->string.pointer+index, whose object is only operand[0]->string.length (u32) bytes, an unbounded kernel heap over-read rather than a few-byte leak.\nI:H - On ACPI_TYPE_STRING, ACPI_ALLOCATE_ZEROED(length+1) wraps to a 0-size allocation when length is UINT64_MAX, then memcpy writes that same untruncated length into it—an out-of-bounds write/heap overflow exploitable for control-flow hijack.\nA:H - memcpy of the untruncated length into the wrapped 0-size STRING buffer in acpi_ex_opcode_3A_1T_1R() oopses or panics the kernel during acpi_ns_execute_table() or a later Mid() method evaluation."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/acpi/acpica/exoparg3.c"],"versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"6da963ed4c3de0963c23809af3194323328080d2","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"e539003886b34c8109574820b9ba67f0dbe62a12","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"9010ad440f970e684324d507510415a67bc125e4","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"4532c9cf006bb6323957897455b6a5ab45957a19","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"d0d89f2e16a874e0f8fb17045da293e8bedf8b21","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"b96401812cbfbb4803faabeefa1f20b8562268b3","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"0e2021f49e64b3c8a9aa880d0c62a218bfe147ce","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/exoparg3.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/6da963ed4c3de0963c23809af3194323328080d2"},{"url":"https://git.kernel.org/stable/c/e539003886b34c8109574820b9ba67f0dbe62a12"},{"url":"https://git.kernel.org/stable/c/9010ad440f970e684324d507510415a67bc125e4"},{"url":"https://git.kernel.org/stable/c/4532c9cf006bb6323957897455b6a5ab45957a19"},{"url":"https://git.kernel.org/stable/c/d0d89f2e16a874e0f8fb17045da293e8bedf8b21"},{"url":"https://git.kernel.org/stable/c/b96401812cbfbb4803faabeefa1f20b8562268b3"},{"url":"https://git.kernel.org/stable/c/0e2021f49e64b3c8a9aa880d0c62a218bfe147ce"}],"title":"ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)","x_generator":{"engine":"bippy-1.2.0"}}}}