CVE-2025-37880 Information

Description

In the Linux kernel the following vulnerability has been resolved:

um: work around sched_yield not yielding in time-travel mode

sched_yield by a userspace may not actually cause scheduling in time-travel mode as no time has passed. In the case seen it appears to be a badly implemented userspace spinlock in ASAN. Unfortunately with time-travel it causes an extreme slowdown or even deadlock depending on the kernel configuration (CONFIG_UML_MAX_USERSPACE_ITERATIONS).

Work around it by accounting time to the process whenever it executes a sched_yield syscall.

Reference

https://git.kernel.org/stable/c/887c5c12e80c8424bd471122d2e8b6b462e12874 https://git.kernel.org/stable/c/990ddc65173776f1e01e7135d8c1fd5f8fd4d5d2 https://git.kernel.org/stable/c/da780c4a075ba2deb05ae29f0af4a990578c7901