154 lines
8.1 KiB
JSON
154 lines
8.1 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-2026-23014",
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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": "2026-01-13T15:37:45.940Z",
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"datePublished": "2026-01-28T14:24:44.189Z",
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"dateUpdated": "2026-08-05T12:20:09.884Z"
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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": "2026-08-05T12:20:09.884Z"
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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\nperf: Ensure swevent hrtimer is properly destroyed\n\nWith the change to hrtimer_try_to_cancel() in\nperf_swevent_cancel_hrtimer() it appears possible for the hrtimer to\nstill be active by the time the event gets freed.\n\nMake sure the event does a full hrtimer_cancel() on the free path by\ninstalling a perf_event::destroy handler."
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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 vulnerable code is reached through the local perf_event_open(2) syscall by creating a software cpu-clock or task-clock sampling event. There is no network, adjacent, or physical attack path.\nAC:L - The attacker controls event creation, timer activation, and fd close/release, and can repeat the sequence to hit the hrtimer lifetime race. No unusual external condition beyond normal perf availability is required.\nPR:L - A basic local user can create a per-task hrtimer-backed perf event for itself, for example with exclude_kernel=1, without needing CPU-wide or kernel-profiling privileges. More privileged modes exist, but they are not required for this vulnerable path.\nUI:N - Exploitation does not require any victim action after the attacker runs local code. The attacker can open and close the perf event directly.\nS:U - The impact remains within the kernel security authority of the same system. This is a standard local kernel memory corruption/privilege escalation scenario, not a VM escape or cross-scope boundary violation.\nC:H - The bug leaves an hrtimer callback referencing a freed perf_event object, creating a use-after-free condition. Under conservative kernel UAF scoring, this can plausibly be leveraged for kernel memory disclosure.\nI:H - The dangling callback dereferences the freed object and can reach function-pointer-bearing perf_event state such as PMU and overflow handling paths. Treating the UAF conservatively, this is plausibly exploitable for kernel control-flow or arbitrary write effects.\nA:H - Even without full exploitation, the stale hrtimer callback can dereference freed or reused kernel memory and crash or panic the system. The availability impact is therefore high."
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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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"kernel/events/core.c"
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],
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"versions": [
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{
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"version": "eb3182ef0405ff2f6668fd3e5ff9883f60ce8801",
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"lessThan": "deee9dfb111ab00f9dfd46c0c7e36656b80f5235",
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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": "eb3182ef0405ff2f6668fd3e5ff9883f60ce8801",
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"lessThan": "ff5860f5088e9076ebcccf05a6ca709d5935cfa9",
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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": "6b8c512811644cf2f5eaf6f44e928683c54127f0",
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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": "6.17.8",
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"lessThan": "6.18",
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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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"kernel/events/core.c"
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],
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"versions": [
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{
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"version": "6.18",
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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": "6.18",
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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": "6.18.6",
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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": "6.19",
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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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"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": "6.18",
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"versionEndExcluding": "6.18.6"
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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": "6.18",
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"versionEndExcluding": "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": "6.17.8"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/deee9dfb111ab00f9dfd46c0c7e36656b80f5235"
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},
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{
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"url": "https://git.kernel.org/stable/c/ff5860f5088e9076ebcccf05a6ca709d5935cfa9"
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}
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],
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"title": "perf: Ensure swevent hrtimer is properly destroyed",
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"x_generator": {
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