{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.5-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "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 + 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's 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.",
  "id": "DEBIAN-CVE-2026-80671",
  "modified": "2026-09-15T08:47:41.452083545Z",
  "published": "2026-08-28T08:16:52.410Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-80671"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-80671"
  ]
}