fbdev: udlfb: avoid divide-by-zero on FBIOPUT_VSCREENINFO
In the Linux kernel, the following vulnerability has been resolved: fbdev: udlfb: 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.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: fbdev: udlfb: 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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/03797cdee38ef19c87785622d423aabaafb71c5f
- https://git.kernel.org/stable/c/6de048d78f3029744778b7a2891745f3ca7c209a
- https://git.kernel.org/stable/c/828ce54b27de93bd9c67991bca5a2c76c76742de
- https://git.kernel.org/stable/c/9981de9fb5ae0d3d6bc5ff5ca63350c2a3cdc564
- https://git.kernel.org/stable/c/a31e4518bec70333a0a98f2946a12b53b45fe5b9
- https://git.kernel.org/stable/c/afaaaa38579f1252bb42b145f6e88a955c4f73f3
- https://git.kernel.org/stable/c/cccbf9b7fdab48ce4feb69c24f7f928aa8e4e8b8
- https://git.kernel.org/stable/c/cce24f70090e0decb597b88bc52e8ef8efed6105
- https://git.kernel.org/stable/c/fd50ab7dd4ee5bbb4aebffa76ae18484b03a8ea5
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31605.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-31605