{"schema":"threatline.record/2","record":{"id":"CVE-2026-97587","aliases":[],"summary":"perf: RISC-V: store available counter mask as bitmap","details":"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]","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97587","source_modified_at":"2026-10-21T12:53:21.400Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","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"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97587","source_modified_at":"2026-10-21T12:53:21.400Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","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"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97587","source_modified_at":"2026-10-21T12:53:21.400Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5a1b6379eed5b13eac0228b605b0bed988e547e9","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97587","source_modified_at":"2026-10-21T12:53:21.400Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"143668c424772979a45118dc9cc9c2c13a35f41d","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97587","source_modified_at":"2026-10-21T12:53:21.400Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9bec7beaed074bcae4181fde9ff9dfbe4e7b0957","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97587","source_modified_at":"2026-10-21T12:53:21.400Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6809da6e9c08ccc9a09cb0a48c61471679274aaa","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.002,"percentile":0.09304,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:22:06.177Z","modified_at":"2026-10-21T12:53:21.400Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-97587","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:53:21.400Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-97587","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/5a1b6379eed5b13eac0228b605b0bed988e547e9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/143668c424772979a45118dc9cc9c2c13a35f41d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/9bec7beaed074bcae4181fde9ff9dfbe4e7b0957"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/e5481db31f4654e9a1254d5d467d9b1ff2f8b1cb"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/6809da6e9c08ccc9a09cb0a48c61471679274aaa"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-21T12:53:21.400Z","content_hash":"4c4b518e3f4c5d741ad16b13d480fd17399f207ee5dc228633357a34f89f0f42"}}