CVE-2026-31605 PUBLISHED

fbdev: udlfb: avoid divide-by-zero on FBIOPUT_VSCREENINFO

Assigner: Linux
Reserved: 09.03.2026 Published: 24.04.2026 Updated: 24.04.2026

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

fbdev: udlfb: avoid divide-by-zero on FBIOPUT_VSCREENINFO

Much like commit 19f953e74356 ("fbdev: fb_pm2fb: Avoid potential divide by zero error"), we also need to prevent that same crash from happening in the udlfb driver as it uses pixclock directly when dividing, which will crash.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 03797cdee38ef19c87785622d423aabaafb71c5f (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 6de048d78f3029744778b7a2891745f3ca7c209a (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to cccbf9b7fdab48ce4feb69c24f7f928aa8e4e8b8 (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to afaaaa38579f1252bb42b145f6e88a955c4f73f3 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • unaffected from 6.12.83 to 6.12.* (incl.)
  • unaffected from 6.18.24 to 6.18.* (incl.)
  • unaffected from 6.19.14 to 6.19.* (incl.)
  • unaffected from 7.0.1 to 7.0.* (incl.)

References