{
  "cveId": "CVE-2026-97587",
  "url": "https://patchblox.com/security/cve/CVE-2026-97587",
  "summary": "CVE-2026-97587 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-97587, released September 29, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "perf: RISC-V: store available counter mask as bitmap",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  perf: RISC-V: store available counter mask as bitmap  The available-counter mask was a single unsigned long, but iteration uses RISCV_MAX_COUNTERS, which is 64. On RV32 that reads past the object. Filling with an unsigned-long bit at index 32 and above is also wrong.  Use DECLARE_BITMAP and set_bit/bitmap helpers. Walk each bitmap word into CFG_MATCH when checking events, when allocating an index, and when stopping all counters. Set the counter base to i times BITS_PER_LONG. Share the CFG_MATCH ecall through a small helper so the 32-bit argument split is not duplicated. On qemu-system-riscv32 the probe bitmap has bits above XLEN set, so the first word alone is not enough.  [pjw@kernel.org: updated to apply; fixed checkpatch.pl issues]",
  "published": "2026-09-25T11:17:09Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "epss": 0.00206,
  "epssPercentile": 0.10729,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97587",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.111-1",
      "fix": "DEBIAN-CVE-2026-97587",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-97587",
      "released": "2026-09-29T20:26:41Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.7-1",
      "fix": "DEBIAN-CVE-2026-97587",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-97587",
      "released": "2026-09-29T20:26:41Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.111-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-97587",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-97587",
      "released": "2026-09-29T20:26:41Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}