CVE-2026-31603 PUBLISHED

staging: sm750fb: fix division by zero in ps_to_hz()

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

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

staging: sm750fb: fix division by zero in ps_to_hz()

ps_to_hz() is called from hw_sm750_crtc_set_mode() without validating that pixclock is non-zero. A zero pixclock passed via FBIOPUT_VSCREENINFO causes a division by zero.

Fix by rejecting zero pixclock in lynxfb_ops_check_var(), consistent with other framebuffer drivers.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 2f640c6043aeab31a2f607d7605271860c3b11df (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 1412ba36597a82e928f20047f41d6c6582dafe8a (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 6144895a4335a2491c282931f1f2fa610b86339f (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to daf6733bd7c4c5015b431739ac29b0e29021096b (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