Integer overflow in Linux kernel - CVE-2026-89825

Vulnerability details

The vulnerability allows a local user to compromise confidentiality, integrity, and availability.

The vulnerability exists due to integer overflow in the Panthor firmware control interface initialization routines when calculating control-interface offsets from firmware-provided strides. A local user can cause offset calculations to wrap and map invalid firmware control interfaces to compromise confidentiality, integrity, and availability.

Affected software

How to mitigate CVE-2026-89825

External References

• https://git.kernel.org/stable/c/33ae55809aee9b4dca1d00cdee35b527f2bf8626
• https://git.kernel.org/stable/c/3e5c7cddc0073eef6f9bb373189b11a969f1f6f6
• https://git.kernel.org/stable/c/6a47f9fd2d970674ed9dedc52fc7ab76fd015785
• https://git.kernel.org/stable/c/80c9528661c774f899281c9a72011208ff39929e

Related Security Bulletins

• Integer overflow in Linux kernel drm panthor driver