243 lines
13 KiB
JSON
243 lines
13 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-97451",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-24T14:53:16.871Z",
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"datePublished": "2026-09-24T16:04:07.520Z",
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"dateUpdated": "2026-10-03T10:58:35.249Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-03T10:58:35.249Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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()."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.4,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/acpi/acpica/exoparg3.c"
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],
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"versions": [
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "6da963ed4c3de0963c23809af3194323328080d2",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "e539003886b34c8109574820b9ba67f0dbe62a12",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "9010ad440f970e684324d507510415a67bc125e4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "4532c9cf006bb6323957897455b6a5ab45957a19",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "d0d89f2e16a874e0f8fb17045da293e8bedf8b21",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "b96401812cbfbb4803faabeefa1f20b8562268b3",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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"lessThan": "0e2021f49e64b3c8a9aa880d0c62a218bfe147ce",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/acpi/acpica/exoparg3.c"
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],
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"versions": [
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{
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"version": "2.6.12",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "2.6.12",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.271",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.222",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.189",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.158",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.111",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.53",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.12",
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"versionEndExcluding": "5.10.271"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.12",
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"versionEndExcluding": "5.15.222"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.12",
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"versionEndExcluding": "6.1.189"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.12",
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"versionEndExcluding": "6.6.158"
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.12",
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"versionEndExcluding": "6.12.111"
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.12",
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"versionEndExcluding": "6.18.53"
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.12",
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"versionEndExcluding": "7.2"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/6da963ed4c3de0963c23809af3194323328080d2"
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},
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{
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"url": "https://git.kernel.org/stable/c/e539003886b34c8109574820b9ba67f0dbe62a12"
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},
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{
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"url": "https://git.kernel.org/stable/c/9010ad440f970e684324d507510415a67bc125e4"
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},
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{
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"url": "https://git.kernel.org/stable/c/4532c9cf006bb6323957897455b6a5ab45957a19"
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},
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{
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"url": "https://git.kernel.org/stable/c/d0d89f2e16a874e0f8fb17045da293e8bedf8b21"
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},
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{
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"url": "https://git.kernel.org/stable/c/b96401812cbfbb4803faabeefa1f20b8562268b3"
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},
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{
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"url": "https://git.kernel.org/stable/c/0e2021f49e64b3c8a9aa880d0c62a218bfe147ce"
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}
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],
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"title": "ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)",
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"x_generator": {
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"engine": "bippy-1.2.0"
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} |