Tóm tắt nhanh
- CVE-2026-64847 là lỗ hổng mức TRUNG BÌNH (CVSS 6.8) ảnh hưởng anyio.
- Xác suất bị khai thác trong 30 ngày tới (EPSS): 0.16%, cao hơn 4.8% các lỗ hổng khác.
- Cách xử lý: cập nhật lên 4.14.2 hoặc mới hơn.
| Gói / sản phẩm | Phiên bản bị ảnh hưởng | Phiên bản đã vá |
|---|
| anyio PyPI | < 4.14.2
| 4.14.2
|
Mô tả
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 that writes enough attacker-influenced data to stderr can fill the pipe, block before returning the stdout protocol response, and wedge the awaiting process-pool call.
Anyone who runs untrusted or faulty code that writes too much to stderr is at risk.
Patches
This vulnerability will be patched in v4.14.2.
Workarounds
Closing sys.stderr in the target function should at least prevent the deadlock.
Mô tả của NVD
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 standard streams. Worker code that writes enough attacker-influenced data to sys.stderr can fill the pipe and block before returning the standard-output protocol response, causing the awaiting process-pool call to remain blocked indefinitely. Applications that run untrusted or faulty worker code capable of producing substantial standard-error output are affected. This issue is fixed in version 4.14.2.
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