{
  "cveId": "CVE-2026-64402",
  "url": "https://patchblox.com/security/cve/CVE-2026-64402",
  "summary": "CVE-2026-64402 is fixed in 17 products on 1 platform, first by DEBIAN-CVE-2026-64402, released July 26, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  coresight: ultrasoc-smb: Fix OOB write in smb_sy...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  coresight: ultrasoc-smb: Fix OOB write in smb_sync_perf_buffer()  When the SMB sink is used as a perf AUX sink, smb_update_buffer() calls smb_sync_perf_buffer() to copy hardware trace data into the perf AUX ring buffer pages. It derives pg_idx = head \u003E\u003E PAGE_SHIFT from @head, which is handle-\u003Ehead, and indexes dst_pages[pg_idx]. The pg_idx %= nr_pages normalization is only applied after the first loop iteration.  This leaves the initial page index underived from the buffer size, which can result in an out-of-bounds write past dst_pages[] when head exceeds the AUX buffer size.  Normalize head modulo the AUX buffer size before deriving the page index and offset, mirroring tmc_etr_sync_perf_buffer().",
  "published": "2026-07-25T10:17:23Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00129,
  "epssPercentile": 0.02522,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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      "released": "2026-11-07T00:44:01Z"
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  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}