CVE-2025-37880

Published: May 10, 2025Last modified: May 10, 2025

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.

Status

References

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