251 lines
16 KiB
JSON
251 lines
16 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-2024-26768",
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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": "2024-02-19T14:20:24.173Z",
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"datePublished": "2024-04-03T17:00:50.135Z",
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"dateUpdated": "2026-08-05T11:27:07.626Z"
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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": "2026-08-05T11:27:07.626Z"
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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: Change acpi_core_pic[NR_CPUS] to acpi_core_pic[MAX_CORE_PIC]\n\nWith default config, the value of NR_CPUS is 64. When HW platform has\nmore then 64 cpus, system will crash on these platforms. MAX_CORE_PIC\nis the maximum cpu number in MADT table (max physical number) which can\nexceed the supported maximum cpu number (NR_CPUS, max logical number),\nbut kernel should not crash. Kernel should boot cpus with NR_CPUS, let\nthe remainder cpus stay in BIOS.\n\nThe potential crash reason is that the array acpi_core_pic[NR_CPUS] can\nbe overflowed when parsing MADT table, and it is obvious that CORE_PIC\nshould be corresponding to physical core rather than logical core, so it\nis better to define the array as acpi_core_pic[MAX_CORE_PIC].\n\nWith the patch, system can boot up 64 vcpus with qemu parameter -smp 128,\notherwise system will crash with the following message.\n\n[ 0.000000] CPU 0 Unable to handle kernel paging request at virtual address 0000420000004259, era == 90000000037a5f0c, ra == 90000000037a46ec\n[ 0.000000] Oops[#1]:\n[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 6.8.0-rc2+ #192\n[ 0.000000] Hardware name: QEMU QEMU Virtual Machine, BIOS unknown 2/2/2022\n[ 0.000000] pc 90000000037a5f0c ra 90000000037a46ec tp 9000000003c90000 sp 9000000003c93d60\n[ 0.000000] a0 0000000000000019 a1 9000000003d93bc0 a2 0000000000000000 a3 9000000003c93bd8\n[ 0.000000] a4 9000000003c93a74 a5 9000000083c93a67 a6 9000000003c938f0 a7 0000000000000005\n[ 0.000000] t0 0000420000004201 t1 0000000000000000 t2 0000000000000001 t3 0000000000000001\n[ 0.000000] t4 0000000000000003 t5 0000000000000000 t6 0000000000000030 t7 0000000000000063\n[ 0.000000] t8 0000000000000014 u0 ffffffffffffffff s9 0000000000000000 s0 9000000003caee98\n[ 0.000000] s1 90000000041b0480 s2 9000000003c93da0 s3 9000000003c93d98 s4 9000000003c93d90\n[ 0.000000] s5 9000000003caa000 s6 000000000a7fd000 s7 000000000f556b60 s8 000000000e0a4330\n[ 0.000000] ra: 90000000037a46ec platform_init+0x214/0x250\n[ 0.000000] ERA: 90000000037a5f0c efi_runtime_init+0x30/0x94\n[ 0.000000] CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE)\n[ 0.000000] PRMD: 00000000 (PPLV0 -PIE -PWE)\n[ 0.000000] EUEN: 00000000 (-FPE -SXE -ASXE -BTE)\n[ 0.000000] ECFG: 00070800 (LIE=11 VS=7)\n[ 0.000000] ESTAT: 00010000 [PIL] (IS= ECode=1 EsubCode=0)\n[ 0.000000] BADV: 0000420000004259\n[ 0.000000] PRID: 0014c010 (Loongson-64bit, Loongson-3A5000)\n[ 0.000000] Modules linked in:\n[ 0.000000] Process swapper (pid: 0, threadinfo=(____ptrval____), task=(____ptrval____))\n[ 0.000000] Stack : 9000000003c93a14 9000000003800898 90000000041844f8 90000000037a46ec\n[ 0.000000] 000000000a7fd000 0000000008290000 0000000000000000 0000000000000000\n[ 0.000000] 0000000000000000 0000000000000000 00000000019d8000 000000000f556b60\n[ 0.000000] 000000000a7fd000 000000000f556b08 9000000003ca7700 9000000003800000\n[ 0.000000] 9000000003c93e50 9000000003800898 9000000003800108 90000000037a484c\n[ 0.000000] 000000000e0a4330 000000000f556b60 000000000a7fd000 000000000f556b08\n[ 0.000000] 9000000003ca7700 9000000004184000 0000000000200000 000000000e02b018\n[ 0.000000] 000000000a7fd000 90000000037a0790 9000000003800108 0000000000000000\n[ 0.000000] 0000000000000000 000000000e0a4330 000000000f556b60 000000000a7fd000\n[ 0.000000] 000000000f556b08 000000000eaae298 000000000eaa5040 0000000000200000\n[ 0.000000] ...\n[ 0.000000] Call Trace:\n[ 0.000000] [<90000000037a5f0c>] efi_runtime_init+0x30/0x94\n[ 0.000000] [<90000000037a46ec>] platform_init+0x214/0x250\n[ 0.000000] [<90000000037a484c>] setup_arch+0x124/0x45c\n[ 0.000000] [<90000000037a0790>] start_kernel+0x90/0x670\n[ 0.000000] [<900000000378b0d8>] kernel_entry+0xd8/0xdc"
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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:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.2,
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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:N - The overflow is reached only from `__init` MADT parsing during `setup_arch()`, with input supplied by platform firmware, the hypervisor's VM configuration, or a root-supplied initrd ACPI table override — all of which require local control of the machine's boot environment rather than physical presence.\nAC:L - The out-of-bounds store is deterministic — any MADT `Core PIC` entry with `core_id >= NR_CPUS` reliably writes past `acpi_core_pic[]`, with no race to win and no memory layout the attacker cannot already influence.\nPR:H - This is pre-userspace code, so no unprivileged or namespace-based path exists; supplying the MADT requires firmware control, hypervisor/VM-configuration control, or real root to plant an initrd table override (itself blocked under kernel lockdown).\nUI:N - Once the crafted or oversized MADT is in place the corruption occurs automatically on the next boot, with no action required from any other user.\nS:U - The out-of-bounds write corrupts kernel `.bss` within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed by the overflow itself.\nC:H - Writing a 20-byte structure at an unvalidated `u32`-scaled offset corrupts arbitrary adjacent kernel globals, and such memory corruption of early-boot state (EFI/`loongson_sysconf` structures, pointers used later by the kernel) is leverageable to disclose kernel memory.\nI:H - This is a direct out-of-bounds write of attacker/firmware-controlled contents at an attacker-influenced index, giving a powerful write primitive over kernel data — per guidance, OOB writes score High.\nA:H - The documented result is a kernel Oops in `efi_runtime_init` during `start_kernel()`, rendering the system unbootable — a complete availability loss."
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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/include/asm/acpi.h",
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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": "fa96b57c149061f71a70bd6582d995f6424fbbf4",
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"lessThan": "88e189bd16e5889e44a41b3309558ebab78b9280",
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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": "fa96b57c149061f71a70bd6582d995f6424fbbf4",
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"lessThan": "0f6810e39898af2d2cabd9313e4dbc945fb5dfdd",
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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": "fa96b57c149061f71a70bd6582d995f6424fbbf4",
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"lessThan": "4551b30525cf3d2f026b92401ffe241eb04dfebe",
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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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"arch/loongarch/include/asm/acpi.h",
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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": "5.19",
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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": "5.19",
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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": "6.6.19",
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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": "6.7.7",
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"lessThanOrEqual": "6.7.*",
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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": "6.8",
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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": "5.19",
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"versionEndExcluding": "6.6.19"
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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": "5.19",
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"versionEndExcluding": "6.7.7"
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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": "5.19",
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"versionEndExcluding": "6.8"
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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/88e189bd16e5889e44a41b3309558ebab78b9280"
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},
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{
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"url": "https://git.kernel.org/stable/c/0f6810e39898af2d2cabd9313e4dbc945fb5dfdd"
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},
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{
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"url": "https://git.kernel.org/stable/c/4551b30525cf3d2f026b92401ffe241eb04dfebe"
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}
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],
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"title": "LoongArch: Change acpi_core_pic[NR_CPUS] to acpi_core_pic[MAX_CORE_PIC]",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"problemTypes": [
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{
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"descriptions": [
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{
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"type": "CWE",
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"cweId": "CWE-120",
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"lang": "en",
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"description": "CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"
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}
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]
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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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"scope": "CHANGED",
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"version": "3.1",
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"baseScore": 6.5,
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"attackVector": "LOCAL",
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"baseSeverity": "MEDIUM",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "NONE"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2024-04-03T19:30:26.181836Z",
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"id": "CVE-2024-26768",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-11-07T19:36:27.034Z"
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}
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},
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{
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2024-08-02T00:14:13.501Z"
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},
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/88e189bd16e5889e44a41b3309558ebab78b9280",
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"tags": [
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"x_transferred"
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]
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},
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{
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"url": "https://git.kernel.org/stable/c/0f6810e39898af2d2cabd9313e4dbc945fb5dfdd",
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"tags": [
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]
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{
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"url": "https://git.kernel.org/stable/c/4551b30525cf3d2f026b92401ffe241eb04dfebe",
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"tags": [
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}
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]
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}
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} |