{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-97960",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:18:58.206Z",
        "datePublished": "2026-09-25T10:23:04.943Z",
        "dateUpdated": "2026-10-21T12:53:50.943Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-21T12:53:50.943Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86/intel: Prevent drain_pebs() reentry\n\nThe PEBS buffer is shared by all events on a CPU, so drain_pebs() must\nnot be reentered. If so, one instance may observe stale buffer state and\npotentially access out-of-bound memory.\n\nMost invocations happen in NMI context, which naturally prevents reentry.\nHowever, drain_pebs() is also reachable from process context via\nintel_pmu_drain_pebs_buffer().\n\nIn those paths, the PMU is often already disabled, but not guaranteed.\nFor example, __intel_pmu_pebs_disable() only disables the target counter,\nso other active counters can still raise a PMI and interrupt an in-flight\ndrain_pebs(). Here is an example,\n\n__perf_addr_filters_adjust()\n  perf_event_stop()\n    __perf_event_stop()\n      x86_pmu_stop() (event->pmu->stop)\n        intel_pmu_disable_event()\n          intel_pmu_pebs_disable()\n            __intel_pmu_pebs_disable()\n              intel_pmu_drain_large_pebs()\n                intel_pmu_drain_pebs_buffer()\n\nIntroduce __intel_pmu_quiesce() and __intel_pmu_resume() helpers and\nuse them in intel_pmu_drain_large_pebs() to disable the full PMU\naround the intel_pmu_drain_pebs_buffer() call, preventing reentry.\n\nAlso add a warning in intel_pmu_drain_pebs_buffer() when the full PMU is\nnot disabled."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/events/intel/core.c",
                        "arch/x86/events/intel/ds.c",
                        "arch/x86/events/perf_event.h"
                    ],
                    "versions": [
                        {
                            "version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60",
                            "lessThan": "9882068ed242fcd4743f53027e8c790e88dcafff",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60",
                            "lessThan": "999e482fdf89400cc1ae937680fc05096b4c915b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60",
                            "lessThan": "a5fe19dd8b3ed5fad6e5e0f0c58c7245043ee4af",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60",
                            "lessThan": "c55599c0ec2aa020e41a0599c3044c56d8a2e7d9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60",
                            "lessThan": "a56c03a397e2cd0c4cf8da96dcd6214f7d0e7d8c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a9165207b2b07415eeb01b3ac8bb84976ec96984",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.3.7",
                            "lessThan": "6.4",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/events/intel/core.c",
                        "arch/x86/events/intel/ds.c",
                        "arch/x86/events/perf_event.h"
                    ],
                    "versions": [
                        {
                            "version": "6.4",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.4",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.114",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.53",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.7",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "6.4",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "6.12.114"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "6.18.53"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "7.2.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "7.3"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.3.7"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/9882068ed242fcd4743f53027e8c790e88dcafff"
                },
                {
                    "url": "https://git.kernel.org/stable/c/999e482fdf89400cc1ae937680fc05096b4c915b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a5fe19dd8b3ed5fad6e5e0f0c58c7245043ee4af"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c55599c0ec2aa020e41a0599c3044c56d8a2e7d9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a56c03a397e2cd0c4cf8da96dcd6214f7d0e7d8c"
                }
            ],
            "title": "perf/x86/intel: Prevent drain_pebs() reentry",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}