208 lines
11 KiB
JSON
208 lines
11 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-2026-89904",
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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": "2026-09-11T19:38:34.774Z",
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"datePublished": "2026-09-16T10:32:03.752Z",
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"dateUpdated": "2026-10-19T08:54:37.029Z"
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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": "2026-10-19T08:54:37.029Z"
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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\nLoongArch: Fix acpi_package_ids[] array overflow\n\nWith LoongArch virt machine, a typical setting is one core per socket,\nthere will max 256 sockets (packages) on one VM. With PPTT acpi table,\narray acpi_package_ids[] will be overflowed.\n\nHere change the array size of acpi_package_ids[] with the max value of\nMAX_PACKAGES and KVM_MAX_VCPUS."
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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 overflow is in parse_acpi_topology(), called from loongson_prepare_cpus() during smp_prepare_cpus() as the kernel consumes the firmware or VMM ACPI PPTT table at boot; there is no network, adjacent-network, or USB path into this parser.\nAC:L - A LoongArch virt machine with the typical one-core-per-socket layout can expose up to 256 packages (KVM_MAX_VCPUS) against acpi_package_ids[MAX_PACKAGES] (16 entries); each new PPTT package ID is stored via acpi_package_ids[acpi_nr_packages++] with no bounds check, so the overflow is deterministic with no race.\nPR:N - PPTT is parsed automatically during SMP bring-up with no capable() check, Linux login, or syscall. A hypervisor-generated virt-machine table or supply-chain/evil-maid firmware with more than 16 unique packages triggers the write without any account or user-namespace privilege.\nUI:N - The out-of-bounds write runs as part of ordinary kernel_init_freeable() SMP setup before userspace starts; no victim mount, file open, or other interactive action is required.\nS:U - The write corrupts kernel BSS and related globals inside the same kernel that parsed PPTT. This is not a KVM guest-to-host escape, sandbox breakout, or IOMMU/DMA authority crossing.\nC:H - Firmware-controlled 32-bit topology IDs are written past acpi_package_ids[] into adjacent kernel BSS, and the later canonicalization loop also reads past the array. Per memory-corruption guidance that is High confidentiality, not a bounded few-byte leak.\nI:H - This is a direct out-of-bounds write of firmware-controlled ints past a 16-entry static array (up to hundreds of stores on large VMs). Out-of-bounds writes score High because they can smash adjacent BSS, including function pointers, and enable control-flow hijack.\nA:H - Smashing kernel BSS during SMP bring-up can oops, panic, or prevent boot. Canonicalized package IDs >= MAX_PACKAGES also index loongson3_cpufreq's cpufreq_mutex[MAX_PACKAGES] out of bounds, causing further crashes."
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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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"arch/loongarch/kernel/acpi.c"
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],
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"versions": [
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{
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"version": "f18992be262d6515c94bf4bf6ce7598135076771",
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"lessThan": "0195e04b1eec8fb00e2db9c5e55655a3f5e76f60",
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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": "4427a33faabb4b81511b99dfee18ce0a38b5b5df",
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"lessThan": "d3fd094c13c6d0b74f246461ca4cf427d539c8e8",
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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": "4e8f58620f6717f72f3d88a2c8f25c0c656d0ba7",
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"lessThan": "6311b8c471afa33c18adbe4eb16f862936b71ca3",
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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": "4e8f58620f6717f72f3d88a2c8f25c0c656d0ba7",
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"lessThan": "2a2367d46d7a4ee4122b7a86e57125542dbbe963",
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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": "496bc868d9066e034787aa14b8ad6c23e77b51ef",
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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": "6.12.101",
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"lessThan": "6.12.110",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.18.42",
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"lessThan": "6.18.51",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "7.1.6",
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"lessThan": "7.2",
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"status": "affected",
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"versionType": "semver"
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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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"arch/loongarch/kernel/acpi.c"
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],
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"versions": [
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{
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"version": "7.2",
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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": "7.2",
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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": "6.12.110",
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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": "6.18.51",
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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": "7.2.5",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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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"negate": false,
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.12.101",
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"versionEndExcluding": "6.12.110"
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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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"versionEndExcluding": "7.2.5"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "7.2",
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"versionEndExcluding": "7.3"
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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": "7.1.6"
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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/0195e04b1eec8fb00e2db9c5e55655a3f5e76f60"
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},
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{
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"url": "https://git.kernel.org/stable/c/d3fd094c13c6d0b74f246461ca4cf427d539c8e8"
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},
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{
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"url": "https://git.kernel.org/stable/c/6311b8c471afa33c18adbe4eb16f862936b71ca3"
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},
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{
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"url": "https://git.kernel.org/stable/c/2a2367d46d7a4ee4122b7a86e57125542dbbe963"
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}
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],
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"title": "LoongArch: Fix acpi_package_ids[] array overflow",
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"x_generator": {
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} |