{
  "cveId": "CVE-2024-26867",
  "url": "https://patchblox.com/security/cve/CVE-2024-26867",
  "summary": "CVE-2024-26867 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-26867, released April 17, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  comedi: comedi_8255: Correct error in subdevice...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  comedi: comedi_8255: Correct error in subdevice initialization  The refactoring done in commit 5c57b1ccecc7 (\u0022comedi: comedi_8255: Rework subdevice initialization functions\u0022) to the initialization of the io field of struct subdev_8255_private broke all cards using the drivers/comedi/drivers/comedi_8255.c module.  Prior to 5c57b1ccecc7, __subdev_8255_init() initialized the io field in the newly allocated struct subdev_8255_private to the non-NULL callback given to the function, otherwise it used a flag parameter to select between subdev_8255_mmio and subdev_8255_io. The refactoring removed that logic and the flag, as subdev_8255_mm_init() and subdev_8255_io_init() now explicitly pass subdev_8255_mmio and subdev_8255_io respectively to __subdev_8255_init(), only __subdev_8255_init() never sets spriv-\u003Eio to the supplied callback. That spriv-\u003Eio is NULL leads to a later BUG:  BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD 0 P4D 0 Oops: 0010 [#1] SMP PTI CPU: 1 PID: 1210 Comm: systemd-udevd Not tainted 6.7.3-x86_64 #1 Hardware name: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffa3f1c02d7b78 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff91f847aefd00 RCX: 000000000000009b RDX: 0000000000000003 RSI: 0000000000000001 RDI: ffff91f840f6fc00 RBP: ffff91f840f6fc00 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 000000000000005f R12: 0000000000000000 R13: 0000000000000000 R14: ffffffffc0102498 R15: ffff91f847ce6ba8 FS:  00007f72f4e8f500(0000) GS:ffff91f8d5c80000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000010540e000 CR4: 00000000000406f0 Call Trace:  \u003CTASK\u003E  ? __die_body\u002B0x15/0x57  ? page_fault_oops\u002B0x2ef/0x33c  ? insert_vmap_area.constprop.0\u002B0xb6/0xd5  ? alloc_vmap_area\u002B0x529/0x5ee  ? exc_page_fault\u002B0x15a/0x489  ? asm_exc_page_fault\u002B0x22/0x30  __subdev_8255_init\u002B0x79/0x8d [comedi_8255]  pci_8255_auto_attach\u002B0x11a/0x139 [8255_pci]  comedi_auto_config\u002B0xac/0x117 [comedi]  ? __pfx___driver_attach\u002B0x10/0x10  pci_device_probe\u002B0x88/0xf9  really_probe\u002B0x101/0x248  __driver_probe_device\u002B0xbb/0xed  driver_probe_device\u002B0x1a/0x72  __driver_attach\u002B0xd4/0xed  bus_for_each_dev\u002B0x76/0xb8  bus_add_driver\u002B0xbe/0x1be  driver_register\u002B0x9a/0xd8  comedi_pci_driver_register\u002B0x28/0x48 [comedi_pci]  ? __pfx_pci_8255_driver_init\u002B0x10/0x10 [8255_pci]  do_one_initcall\u002B0x72/0x183  do_init_module\u002B0x5b/0x1e8  init_module_from_file\u002B0x86/0xac  __do_sys_finit_module\u002B0x151/0x218  do_syscall_64\u002B0x72/0xdb  entry_SYSCALL_64_after_hwframe\u002B0x6e/0x76 RIP: 0033:0x7f72f50a0cb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003C48\u003E 3d 01 f0 ff ff 73 01 c3 48 8b 0d 47 71 0c 00 f7 d8 64 89 01 48 RSP: 002b:00007ffd47e512d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 RAX: ffffffffffffffda RBX: 0000562dd06ae070 RCX: 00007f72f50a0cb9 RDX: 0000000000000000 RSI: 00007f72f52d32df RDI: 000000000000000e RBP: 0000000000000000 R08: 00007f72f5168b20 R09: 0000000000000000 R10: 0000000000000050 R11: 0000000000000246 R12: 00007f72f52d32df R13: 0000000000020000 R14: 0000562dd06785c0 R15: 0000562dcfd0e9a8  \u003C/TASK\u003E Modules linked in: 8255_pci(\u002B) comedi_8255 comedi_pci comedi intel_gtt e100(\u002B) acpi_cpufreq rtc_cmos usbhid CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffa3f1c02d7b78 EFLAGS: 00010202 RAX: 0000000000000000 RBX: ffff91f847aefd00 RCX: 000000000000009b RDX: 0000000000000003 RSI: 0000000000000001 RDI: ffff91f840f6fc00 RBP: ffff91f840f6fc00 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: 000000000000005f R12: 0000000000000000 R13: 0000000000000000 R14: ffffffffc0102498 R15: ffff91f847ce6ba8 FS:  ---truncated---",
  "published": "2024-04-17T11:15:09Z",
  "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": 0.00193,
  "epssPercentile": 0.09084,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.7.12-1",
      "fix": "DEBIAN-CVE-2024-26867",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-26867",
      "released": "2024-04-17T11:15:09Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.7.12-1",
      "fix": "DEBIAN-CVE-2024-26867",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-26867",
      "released": "2024-04-17T11:15:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}