CVE-2024-39475: fbdev: savage: Handle err return when savagefb_check_var failed

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-05 · updated 2026-06-17
Weakness: CWE-369

Description

In the Linux kernel, the following vulnerability has been resolved: fbdev: savage: Handle err return when savagefb_check_var failed The commit 04e5eac8f3ab("fbdev: savage: Error out if pixclock equals zero") checks the value of pixclock to avoid divide-by-zero error. However the function savagefb_probe doesn't handle the error return of savagefb_check_var. When pixclock is 0, it will cause divide-by-zero error.

Affected products

Linux kernel: from 4.19 before 4.19.316; from 5.4 before 5.4.278; from 5.10 before 5.10.219; from 5.15 before 5.15.161; from 6.1 before 6.1.94; from 6.6 before 6.6.34 — fixed in 4.19.316, 5.10.219, 5.15.161, 5.4.278, 6.1.94, 6.6.34

How to fix

Upgrade to a fixed version: Linux kernel 4.19.316, 5.10.219, 5.15.161, 5.4.278. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-39475 or the next vulnerability affects your stack