{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.16.8-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  tracing/osnoise: Fix null-ptr-deref in bitmap_parselist()  A crash was observed with the following output:  BUG: kernel NULL pointer dereference, address: 0000000000000010 Oops: Oops: 0000 [#1] SMP NOPTI CPU: 2 UID: 0 PID: 92 Comm: osnoise_cpus Not tainted 6.17.0-rc4-00201-gd69eb204c255 #138 PREEMPT(voluntary) RIP: 0010:bitmap_parselist+0x53/0x3e0 Call Trace:  \u003cTASK\u003e  osnoise_cpus_write+0x7a/0x190  vfs_write+0xf8/0x410  ? do_sys_openat2+0x88/0xd0  ksys_write+0x60/0xd0  do_syscall_64+0xa4/0x260  entry_SYSCALL_64_after_hwframe+0x77/0x7f  \u003c/TASK\u003e  This issue can be reproduced by below code:  fd=open(\"/sys/kernel/debug/tracing/osnoise/cpus\", O_WRONLY); write(fd, \"0-2\", 0);  When user pass 'count=0' to osnoise_cpus_write(), kmalloc() will return ZERO_SIZE_PTR (16) and cpulist_parse() treat it as a normal value, which trigger the null pointer dereference. Add check for the parameter 'count'.",
  "id": "DEBIAN-CVE-2025-39887",
  "modified": "2026-09-01T19:48:06.965019138Z",
  "published": "2025-09-23T06:15:48.820Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2025-39887"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2025-39887"
  ]
}