CVE-2026-31618 PUBLISHED

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

Assigner: Linux
Reserved: 09.03.2026 Published: 24.04.2026 Updated: 25.04.2026

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

fbdev: tdfxfb: 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 53cb4e79a07124d2ebe502983c29800104080b47 (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to fc386daa6846551a88d338ba9864fc2812cd9030 (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 6567d3e1aaadfebf44ce7dc9ea2630323cd4c736 (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 63dfb0b4741f46d65b667c4275132b3d1966acc8 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 2.6.12 is affected
  • unaffected from 0 to 2.6.12 (excl.)
  • 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