CVE-2025-21711 Information

Description

In the Linux kernel the following vulnerability has been resolved:

net/rose: prevent integer overflows in rose_setsockopt()

In case of possible unpredictably large arguments passed to rose_setsockopt() and multiplied by extra values on top of that integer overflows may occur.

Do the safest minimum and fix these issues by checking the contents of ‘opt’ and returning -EINVAL if they are too large. Also switch to unsigned int and remove useless check for negative ‘opt’ in ROSE_IDLE case.

Reference

https://git.kernel.org/stable/c/352daa50946c3bbb662432e8daf54d6760796589 https://git.kernel.org/stable/c/9bdee49ad6bbd26ab5e13cc6731e54fb1b6c1dca https://git.kernel.org/stable/c/d08f4074f9c69f7e95502587eb1b258a965ba7f0 https://git.kernel.org/stable/c/d640627663bfe7d8963c7615316d7d4ef60f3b0b https://git.kernel.org/stable/c/e5338930a29d0ab2a5af402f5f664aeba0d1a676