{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-38055",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T04:51:23.979Z",
        "datePublished": "2025-06-18T09:33:35.556Z",
        "dateUpdated": "2026-05-23T15:58:53.921Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T15:58:53.921Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86/intel: Fix segfault with PEBS-via-PT with sample_freq\n\nCurrently, using PEBS-via-PT with a sample frequency instead of a sample\nperiod, causes a segfault.  For example:\n\n    BUG: kernel NULL pointer dereference, address: 0000000000000195\n    <NMI>\n    ? __die_body.cold+0x19/0x27\n    ? page_fault_oops+0xca/0x290\n    ? exc_page_fault+0x7e/0x1b0\n    ? asm_exc_page_fault+0x26/0x30\n    ? intel_pmu_pebs_event_update_no_drain+0x40/0x60\n    ? intel_pmu_pebs_event_update_no_drain+0x32/0x60\n    intel_pmu_drain_pebs_icl+0x333/0x350\n    handle_pmi_common+0x272/0x3c0\n    intel_pmu_handle_irq+0x10a/0x2e0\n    perf_event_nmi_handler+0x2a/0x50\n\nThat happens because intel_pmu_pebs_event_update_no_drain() assumes all the\npebs_enabled bits represent counter indexes, which is not always the case.\nIn this particular case, bits 60 and 61 are set for PEBS-via-PT purposes.\n\nThe behaviour of PEBS-via-PT with sample frequency is questionable because\nalthough a PMI is generated (PEBS_PMI_AFTER_EACH_RECORD), the period is not\nadjusted anyway.\n\nPutting that aside, fix intel_pmu_pebs_event_update_no_drain() by passing\nthe mask of counter bits instead of 'size'.  Note, prior to the Fixes\ncommit, 'size' would be limited to the maximum counter index, so the issue\nwas not hit."
                }
            ],
            "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/ds.c"
                    ],
                    "versions": [
                        {
                            "version": "722e42e45c2f1c6d1adec7813651dba5139f52f4",
                            "lessThan": "ca51db23166767a8445deb8331c9b8d5205d9287",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "722e42e45c2f1c6d1adec7813651dba5139f52f4",
                            "lessThan": "0b1874a5b1173fbcb2185ab828f4c33d067e551e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "722e42e45c2f1c6d1adec7813651dba5139f52f4",
                            "lessThan": "99bcd91fabada0dbb1d5f0de44532d8008db93c6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "a9d6d466bcf0621a872e1052bc40e4c6f0541b8d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.10.5",
                            "lessThan": "6.11",
                            "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/ds.c"
                    ],
                    "versions": [
                        {
                            "version": "6.11",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.11",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.31",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.14.9",
                            "lessThanOrEqual": "6.14.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.15",
                            "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": "6.11",
                                    "versionEndExcluding": "6.12.31"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "6.14.9"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.11",
                                    "versionEndExcluding": "6.15"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.10.5"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/ca51db23166767a8445deb8331c9b8d5205d9287"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0b1874a5b1173fbcb2185ab828f4c33d067e551e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/99bcd91fabada0dbb1d5f0de44532d8008db93c6"
                }
            ],
            "title": "perf/x86/intel: Fix segfault with PEBS-via-PT with sample_freq",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}