275 lines
14 KiB
JSON
275 lines
14 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-2024-38568",
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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": "2024-06-18T19:36:34.923Z",
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"datePublished": "2024-06-19T13:35:34.925Z",
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"dateUpdated": "2026-08-05T11:32:49.356Z"
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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": "2026-08-05T11:32:49.356Z"
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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\ndrivers/perf: hisi: hns3: Fix out-of-bound access when valid event group\n\nThe perf tool allows users to create event groups through following\ncmd [1], but the driver does not check whether the array index is out\nof bounds when writing data to the event_group array. If the number of\nevents in an event_group is greater than HNS3_PMU_MAX_HW_EVENTS, the\nmemory write overflow of event_group array occurs.\n\nAdd array index check to fix the possible array out of bounds violation,\nand return directly when write new events are written to array bounds.\n\nThere are 9 different events in an event_group.\n[1] perf stat -e '{pmu/event1/, ... ,pmu/event9/}"
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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:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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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 vulnerability is reached solely through the local `perf_event_open(2)` syscall against the HNS3 PMU device exposed under /sys/bus/event_source/devices/; no network or remote input path exists. Attack Vector is therefore Local.\nAC:L - Exploitation is fully deterministic and requires no race, no memory-layout guessing, and no victim state — the attacker simply opens nine events in one group (`perf stat -e '{pmu/event1/,...,pmu/event9/}'`, the reproducer named in the fix), using `attr.disabled=1` to keep the hardware counters unallocated so the `-EBUSY` pre-check is bypassed. Every condition is under the attacker's direct control.\nPR:L - An unprivileged local account suffices on the realistic deployment for this driver — HiSilicon Kunpeng ARM64 servers with NIC PMU profiling enabled, where `kernel.perf_event_paranoid` is set to 0/-1 or CAP_PERFMON is delegated to an observability agent; CAP_PERFMON is explicitly a de-privileged, delegatable capability rather than real root/admin. No authentication beyond a local login is needed, and the OOB write itself executes in `event_init()` before `perf_allow_cpu()` is ever consulted.\nUI:N - The attacker triggers the entire sequence from its own process via repeated `perf_event_open()` calls. No action by any other user or administrator is involved.\nS:U - The out-of-bounds write corrupts the kernel stack of the calling task within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The bug is kernel-stack memory corruption whose written value is a slab pointer to an attacker-groomed `struct perf_event`, landing on adjacent frame state (canary/saved-register slot) that can be leveraged to influence subsequent kernel execution and disclose kernel memory. Per the memory-corruption guidance this is scored High.\nI:H - This is an out-of-bounds *write* past a stack array, and the attacker controls which `perf_event` object's address is written by ordering the group's event allocations, giving corruption of control-relevant stack data. Out-of-bounds writes are scored High.\nA:H - On kernels built with CONFIG_STACKPROTECTOR_STRONG (standard for arm64 distro/server kernels) the overwritten slot is the stack canary, so `__stack_chk_fail()` invokes `panic()` unconditionally — a guaranteed, repeatable full system crash; without the protector it corrupts saved frame state and oopses."
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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/perf/hisilicon/hns3_pmu.c"
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],
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"versions": [
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{
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"lessThan": "3669baf308308385a2ab391324abdde5682af5aa",
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"status": "affected",
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"status": "affected",
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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/perf/hisilicon/hns3_pmu.c"
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],
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"versions": [
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{
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"version": "6.0",
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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": "6.0",
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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": "6.1.93",
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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": "6.6.33",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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{
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"version": "6.8.12",
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"lessThanOrEqual": "6.8.*",
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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": "6.9.3",
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"lessThanOrEqual": "6.9.*",
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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": "6.10",
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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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"cpeApplicability": [
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