staging: sm750fb: fix division by zero in ps_to_hz()
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.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/124a43550db8a74eef080cd4573a4904efe67029
- https://git.kernel.org/stable/c/1412ba36597a82e928f20047f41d6c6582dafe8a
- https://git.kernel.org/stable/c/2f640c6043aeab31a2f607d7605271860c3b11df
- https://git.kernel.org/stable/c/3300b049693138852a4c6738b5f1194a1ee91ddd
- https://git.kernel.org/stable/c/6144895a4335a2491c282931f1f2fa610b86339f
- https://git.kernel.org/stable/c/75a1621e4f91310673c9acbcbb25c2a7ff821cd3
- https://git.kernel.org/stable/c/779412e0e391fd4a0d12e1d1adaa7bf043de62d7
- https://git.kernel.org/stable/c/b285a8f3bbb821a93eb37c2740a68ca1d7112a59
- https://git.kernel.org/stable/c/daf6733bd7c4c5015b431739ac29b0e29021096b
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31603.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-31603