Bug 2461450 (CVE-2026-31603) - CVE-2026-31603 kernel: staging: sm750fb: fix division by zero in ps_to_hz()
Summary: CVE-2026-31603 kernel: staging: sm750fb: fix division by zero in ps_to_hz()
Keywords:
Status: NEW
Alias: CVE-2026-31603
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-24 15:02 UTC by OSIDB Bzimport
Modified: 2026-04-24 19:29 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-04-24 15:02:10 UTC 
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.
Comment 1 Keith Grant 2026-04-24 19:27:25 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026042419-CVE-2026-31603-bfce@gregkh/T
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