Vulnerability Database

309,237

Total vulnerabilities in the database

CVE-2022-50101

In the Linux kernel, the following vulnerability has been resolved:

video: fbdev: vt8623fb: Check the size of screen before memset_io()

In the function vt8623fb_set_par(), the value of 'screen_size' is calculated by the user input. If the user provides the improper value, the value of 'screen_size' may larger than 'info->screen_size', which may cause the following bug:

[ 583.339036] BUG: unable to handle page fault for address: ffffc90005000000 [ 583.339049] #PF: supervisor write access in kernel mode [ 583.339052] #PF: error_code(0x0002) - not-present page [ 583.339074] RIP: 0010:memset_orig+0x33/0xb0 [ 583.339110] Call Trace: [ 583.339118] vt8623fb_set_par+0x11cd/0x21e0 [ 583.339146] fb_set_var+0x604/0xeb0 [ 583.339181] do_fb_ioctl+0x234/0x670 [ 583.339209] fb_ioctl+0xdd/0x130

Fix the this by checking the value of 'screen_size' before memset_io().

  • Published: Jun 18, 2025
  • Updated: Nov 20, 2025
  • CVE: CVE-2022-50101
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.8
  • AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

No CWE or OWASP classifications available.

Software From Fixed in
linux / linux_kernel 2.6.22 4.14.291
linux / linux_kernel 4.15 4.19.256
linux / linux_kernel 4.20 5.4.211
linux / linux_kernel 5.5 5.10.137
linux / linux_kernel 5.11 5.15.61
linux / linux_kernel 5.16 5.18.18
linux / linux_kernel 5.19 5.19.2