fkie_cve-2023-54198
Vulnerability from fkie_nvd
Published
2025-12-30 13:16
Modified
2025-12-30 13:16
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tty: fix out-of-bounds access in tty_driver_lookup_tty() When specifying an invalid console= device like console=tty3270, tty_driver_lookup_tty() returns the tty struct without checking whether index is a valid number. To reproduce: qemu-system-x86_64 -enable-kvm -nographic -serial mon:stdio \ -kernel ../linux-build-x86/arch/x86/boot/bzImage \ -append "console=ttyS0 console=tty3270" This crashes with: [ 0.770599] BUG: kernel NULL pointer dereference, address: 00000000000000ef [ 0.771265] #PF: supervisor read access in kernel mode [ 0.771773] #PF: error_code(0x0000) - not-present page [ 0.772609] Oops: 0000 [#1] PREEMPT SMP PTI [ 0.774878] RIP: 0010:tty_open+0x268/0x6f0 [ 0.784013] chrdev_open+0xbd/0x230 [ 0.784444] ? cdev_device_add+0x80/0x80 [ 0.784920] do_dentry_open+0x1e0/0x410 [ 0.785389] path_openat+0xca9/0x1050 [ 0.785813] do_filp_open+0xaa/0x150 [ 0.786240] file_open_name+0x133/0x1b0 [ 0.786746] filp_open+0x27/0x50 [ 0.787244] console_on_rootfs+0x14/0x4d [ 0.787800] kernel_init_freeable+0x1e4/0x20d [ 0.788383] ? rest_init+0xc0/0xc0 [ 0.788881] kernel_init+0x11/0x120 [ 0.789356] ret_from_fork+0x22/0x30
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3df6f492f500a16c231f07ccc6f6ed1302caddf9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/765566110eb0da3cf60198b0165ecceeaafa6444
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/84ea44dc3e4ecb2632586238014bf6722aa5843b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/953a4a352a0c185460ae1449e4c6e6658e55fdfc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b79109d6470aaae7062998353e3a19449055829d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/db4df8e9d79e7d37732c1a1b560958e8dadfefa1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f9d9d25ad1f0d060eaf297a2f7f03b5855a45561
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fcfeaa570f7a5c2d5f4f14931909531ff18b7fde
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: fix out-of-bounds access in tty_driver_lookup_tty()\n\nWhen specifying an invalid console= device like console=tty3270,\ntty_driver_lookup_tty() returns the tty struct without checking\nwhether index is a valid number.\n\nTo reproduce:\n\nqemu-system-x86_64 -enable-kvm -nographic -serial mon:stdio \\\n-kernel ../linux-build-x86/arch/x86/boot/bzImage \\\n-append \"console=ttyS0 console=tty3270\"\n\nThis crashes with:\n\n[    0.770599] BUG: kernel NULL pointer dereference, address: 00000000000000ef\n[    0.771265] #PF: supervisor read access in kernel mode\n[    0.771773] #PF: error_code(0x0000) - not-present page\n[    0.772609] Oops: 0000 [#1] PREEMPT SMP PTI\n[    0.774878] RIP: 0010:tty_open+0x268/0x6f0\n[    0.784013]  chrdev_open+0xbd/0x230\n[    0.784444]  ? cdev_device_add+0x80/0x80\n[    0.784920]  do_dentry_open+0x1e0/0x410\n[    0.785389]  path_openat+0xca9/0x1050\n[    0.785813]  do_filp_open+0xaa/0x150\n[    0.786240]  file_open_name+0x133/0x1b0\n[    0.786746]  filp_open+0x27/0x50\n[    0.787244]  console_on_rootfs+0x14/0x4d\n[    0.787800]  kernel_init_freeable+0x1e4/0x20d\n[    0.788383]  ? rest_init+0xc0/0xc0\n[    0.788881]  kernel_init+0x11/0x120\n[    0.789356]  ret_from_fork+0x22/0x30"
    }
  ],
  "id": "CVE-2023-54198",
  "lastModified": "2025-12-30T13:16:07.877",
  "metrics": {},
  "published": "2025-12-30T13:16:07.877",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3df6f492f500a16c231f07ccc6f6ed1302caddf9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/765566110eb0da3cf60198b0165ecceeaafa6444"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/84ea44dc3e4ecb2632586238014bf6722aa5843b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/953a4a352a0c185460ae1449e4c6e6658e55fdfc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b79109d6470aaae7062998353e3a19449055829d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/db4df8e9d79e7d37732c1a1b560958e8dadfefa1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f9d9d25ad1f0d060eaf297a2f7f03b5855a45561"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fcfeaa570f7a5c2d5f4f14931909531ff18b7fde"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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