{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23014",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:45.940Z",
        "datePublished": "2026-01-28T14:24:44.189Z",
        "dateUpdated": "2026-08-05T12:20:09.884Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:20:09.884Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "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."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "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."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/events/core.c"
                    ],
                    "versions": [
                        {
                            "version": "eb3182ef0405ff2f6668fd3e5ff9883f60ce8801",
                            "lessThan": "deee9dfb111ab00f9dfd46c0c7e36656b80f5235",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "eb3182ef0405ff2f6668fd3e5ff9883f60ce8801",
                            "lessThan": "ff5860f5088e9076ebcccf05a6ca709d5935cfa9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6b8c512811644cf2f5eaf6f44e928683c54127f0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.17.8",
                            "lessThan": "6.18",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/events/core.c"
                    ],
                    "versions": [
                        {
                            "version": "6.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.6",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18",
                                    "versionEndExcluding": "6.18.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18",
                                    "versionEndExcluding": "6.19"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.17.8"
                                }
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                        }
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/deee9dfb111ab00f9dfd46c0c7e36656b80f5235"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ff5860f5088e9076ebcccf05a6ca709d5935cfa9"
                }
            ],
            "title": "perf: Ensure swevent hrtimer is properly destroyed",
            "x_generator": {
                "engine": "bippy-1.2.0"
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}