CVE-2026-68270 drm/sysfb: Avoid possible truncation with calculating visible size
An integer overflow in the Linux kernel's system framebuffer calculation can lead to truncation and potential denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68270?
CVE-2026-68270 is a vulnerability in Linux, published on 10 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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().
Which versions are affected by CVE-2026-68270?
How do I fix CVE-2026-68270?
Apply the vendor's patch.
Is CVE-2026-68270 being exploited?
There is no known exploitation of CVE-2026-68270 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68270, DEBIAN-CVE-2026-68270, GHSA-h2r3-cmpf-wx37, UBUNTU-CVE-2026-68270.