{
  "cveId": "CVE-2022-48870",
  "url": "https://patchblox.com/security/cve/CVE-2022-48870",
  "summary": "CVE-2022-48870 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48870, released August 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  tty: fix possible null-ptr-defer in spk_ttyio_re...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  tty: fix possible null-ptr-defer in spk_ttyio_release  Run the following tests on the qemu platform:  syzkaller:~# modprobe speakup_audptr  input: Speakup as /devices/virtual/input/input4  initialized device: /dev/synth, node (MAJOR 10, MINOR 125)  speakup 3.1.6: initialized  synth name on entry is: (null)  synth probe  spk_ttyio_initialise_ldisc failed because tty_kopen_exclusive returned failed (errno -16), then remove the module, we will get a null-ptr-defer problem, as follow:  syzkaller:~# modprobe -r speakup_audptr  releasing synth audptr  BUG: kernel NULL pointer dereference, address: 0000000000000080  #PF: supervisor write access in kernel mode  #PF: error_code(0x0002) - not-present page  PGD 0 P4D 0  Oops: 0002 [#1] PREEMPT SMP PTI  CPU: 2 PID: 204 Comm: modprobe Not tainted 6.1.0-rc6-dirty #1  RIP: 0010:mutex_lock\u002B0x14/0x30  Call Trace:  \u003CTASK\u003E   spk_ttyio_release\u002B0x19/0x70 [speakup]   synth_release.part.6\u002B0xac/0xc0 [speakup]   synth_remove\u002B0x56/0x60 [speakup]   __x64_sys_delete_module\u002B0x156/0x250   ? fpregs_assert_state_consistent\u002B0x1d/0x50   do_syscall_64\u002B0x37/0x90   entry_SYSCALL_64_after_hwframe\u002B0x63/0xcd  \u003C/TASK\u003E  Modules linked in: speakup_audptr(-) speakup  Dumping ftrace buffer:  in_synth-\u003Edev was not initialized during modprobe, so we add check for in_synth-\u003Edev to fix this bug.",
  "published": "2024-08-21T07:15:04Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.0025,
  "epssPercentile": 0.16399,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.8-1",
      "fix": "DEBIAN-CVE-2022-48870",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48870",
      "released": "2024-08-21T07:15:04Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.8-1",
      "fix": "DEBIAN-CVE-2022-48870",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48870",
      "released": "2024-08-21T07:15:04Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.8-1",
      "fix": "DEBIAN-CVE-2022-48870",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48870",
      "released": "2024-08-21T07:15:04Z"
    }
  ],
  "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"
  }
}