{
  "cveId": "CVE-2026-80671",
  "url": "https://patchblox.com/security/cve/CVE-2026-80671",
  "summary": "CVE-2026-80671 is fixed in 57 products on 1 platform, first by DEBIAN-CVE-2026-80671, released August 29, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  perf sched: Fix register_pid() overflow, strcpy,...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  perf sched: Fix register_pid() overflow, strcpy, and BUG_ON  register_pid() has several issues when processing untrusted perf.data:  1. Integer overflow: (pid \u002B 1) * sizeof(struct task_desc *) can wrap    to a small value on 32-bit systems when pid is large (e.g.    0x40000000), causing realloc to return a tiny buffer followed by    out-of-bounds writes in the initialization loop.  2. Heap buffer overflow: strcpy(task-\u003Ecomm, comm) copies the    untrusted comm string into a fixed 20-byte COMM_LEN buffer with    no length check.  3. BUG_ON on allocation failure: perf.data is untrusted input, so    allocation failures should be handled gracefully rather than    killing the process.  4. Realloc of sched-\u003Etasks assigned directly back, leaking the old    pointer on failure; nr_tasks incremented before the realloc,    leaving corrupted state on failure.  Cap pid at PID_MAX_LIMIT (4194304, matching the kernel\u0027s maximum on 64-bit), replace strcpy with strlcpy, guard against NULL comm, replace BUG_ON with NULL returns using safe realloc patterns, and add NULL checks in callers that dereference the result.",
  "published": "2026-08-28T08:16:52Z",
  "severity": "critical",
  "cvss": 9.3,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
  "epss": 0.00156,
  "epssPercentile": 0.04817,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
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      "fix": "ALAS2023-2026-3197",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3197",
      "released": "2026-11-07T01:06:07Z"
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      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3196",
      "released": "2026-11-07T01:06:07Z"
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      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
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      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    }
  ],
  "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"
  }
}