CVE-2025-37880

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

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.

N/A

CVSS

Severity:

EPSS 0.03%

Affected: Linux Linux

References

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

Frequently Asked Questions

What is the severity of CVE-2025-37880?: CVE-2025-37880 has not yet been assigned a CVSS score.
How to fix CVE-2025-37880?: To fix CVE-2025-37880, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-37880 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-37880 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-37880?: CVE-2025-37880 affects Linux Linux, Linux Linux.

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