{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-97587",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-24T16:01:01.157Z",
        "datePublished": "2026-09-25T10:22:06.177Z",
        "dateUpdated": "2026-10-21T12:53:21.400Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-21T12:53:21.400Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf: RISC-V: store available counter mask as bitmap\n\nThe available-counter mask was a single unsigned long, but iteration\nuses RISCV_MAX_COUNTERS, which is 64. On RV32 that reads past the object.\nFilling with an unsigned-long bit at index 32 and above is also wrong.\n\nUse DECLARE_BITMAP and set_bit/bitmap helpers. Walk each bitmap word\ninto CFG_MATCH when checking events, when allocating an index, and when\nstopping all counters. Set the counter base to i times BITS_PER_LONG.\nShare the CFG_MATCH ecall through a small helper so the 32-bit argument\nsplit is not duplicated. On qemu-system-riscv32 the probe bitmap has bits\nabove XLEN set, so the first word alone is not enough.\n\n[pjw@kernel.org: updated to apply; fixed checkpatch.pl issues]"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/perf/riscv_pmu_legacy.c",
                        "drivers/perf/riscv_pmu_sbi.c",
                        "include/linux/perf/riscv_pmu.h"
                    ],
                    "versions": [
                        {
                            "version": "e9991434596f5373dfd75857b445eb92a9253c56",
                            "lessThan": "5a1b6379eed5b13eac0228b605b0bed988e547e9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e9991434596f5373dfd75857b445eb92a9253c56",
                            "lessThan": "143668c424772979a45118dc9cc9c2c13a35f41d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e9991434596f5373dfd75857b445eb92a9253c56",
                            "lessThan": "9bec7beaed074bcae4181fde9ff9dfbe4e7b0957",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e9991434596f5373dfd75857b445eb92a9253c56",
                            "lessThan": "e5481db31f4654e9a1254d5d467d9b1ff2f8b1cb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e9991434596f5373dfd75857b445eb92a9253c56",
                            "lessThan": "6809da6e9c08ccc9a09cb0a48c61471679274aaa",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/perf/riscv_pmu_legacy.c",
                        "drivers/perf/riscv_pmu_sbi.c",
                        "include/linux/perf/riscv_pmu.h"
                    ],
                    "versions": [
                        {
                            "version": "5.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.111",
                            "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": "5.18",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "6.12.111"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "6.18.53"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "7.2.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/5a1b6379eed5b13eac0228b605b0bed988e547e9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/143668c424772979a45118dc9cc9c2c13a35f41d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9bec7beaed074bcae4181fde9ff9dfbe4e7b0957"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e5481db31f4654e9a1254d5d467d9b1ff2f8b1cb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6809da6e9c08ccc9a09cb0a48c61471679274aaa"
                }
            ],
            "title": "perf: RISC-V: store available counter mask as bitmap",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}