CVE-2026-68270: drm/sysfb: Avoid possible truncation with calculating visible size

Severity: unknown
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: 2026-08-10 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: drm/sysfb: Avoid possible truncation with calculating visible size Calculating the visible size of the system framebuffer can result in truncation of the result. The calculation uses 32-bit arithmetics, which can overflow if the values for height and stride are large. Fix the issue by multiplying with mul_u32_u32().

Affected products

Linux kernel: 6.16 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/154795885e8f0033c918c815aece543168bee670
https://git.kernel.org/stable/c/9d58a811739a365cd693192f4b5344d736967a88
https://git.kernel.org/stable/c/b771974988ec7ce077a7246fa0fa588c246fe581

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