AnyIO process-pool workers can block indefinitely on undrained stderr

Impact AnyIO starts process-pool workers with stderr connected to a pipe but never drains that pipe. The worker redirects stdin and stdout to /dev/null to protect its protocol, but does not redirect stderr even though the documentation says all three standard streams are redirected. Worker code...

EUVD-2026-83193

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, AnyIO starts process-pool workers with standard error connected to a pipe that the parent never drains, even though the documented behavior redirects all three...

CVE-2026-64847

AnyIO is a high-level asynchronous concurrency framework. Prior to version 4.14.2 , process-pool workers are started with stderr connected to a pipe that the parent never drains , despite documentation stating all three standard streams are redirected. While stdin and stdout are redirected to /de...

CVE-2026-64847 AnyIO process-pool workers can block indefinitely on undrained stderr

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, AnyIO starts process-pool workers with standard error connected to a pipe that the parent never drains, even though the documented behavior redirects all three...