Upstream information
Description
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.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | SUSE |
|---|---|
| Base Score | 5.5 |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | High |
| CVSSv3 Version | 3.1 |
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 6.8 | 6.8 |
| Vector | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| Attack Vector | Local | Local |
| Attack Complexity | Low | Low |
| Attack Requirements | None | None |
| Privileges Required | Low | Low |
| User Interaction | None | None |
| Vulnerable System Confidentiality Impact | None | None |
| Vulnerable System Integrity Impact | None | None |
| Vulnerable System Availability Impact | High | High |
| Subsequent System Confidentiality Impact | None | None |
| Subsequent System Integrity Impact | None | None |
| Subsequent System Availability Impact | None | None |
| CVSSv4 Version | 4.0 | 4.0 |
SUSE Security Advisories:
- SUSE-SU-2026:4416-1, published Fri Oct 2 19:03:50 CEST 2026
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise Module for Python 3 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 |
| Patchnames: SUSE-SLE-Module-Python3-15-SP7-2026-4416 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-4416 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-4416 |
| SUSE Linux Enterprise High Performance Computing 15 SP4 SUSE Linux Enterprise Module for Public Cloud 15 SP4 SUSE Linux Enterprise Server 15 SP4 SUSE Manager Proxy 4.3 SUSE Manager Retail Branch Server 4.3 SUSE Manager Server 4.3 |
| Patchnames: SUSE-SLE-Module-Public-Cloud-15-SP4-2026-4416 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-4416 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-4416 |
| SUSE Linux Enterprise High Performance Computing 15 SP5 SUSE Linux Enterprise Module for Public Cloud 15 SP5 SUSE Linux Enterprise Server 15 SP5 |
| Patchnames: SUSE-SLE-Module-Public-Cloud-15-SP5-2026-4416 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP6 SUSE Linux Enterprise Server 15 SP6 |
| Patchnames: SUSE-SLE-Module-Public-Cloud-15-SP6-2026-4416 |
| SUSE Linux Enterprise Server 15 SP4-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-4416 |
| SUSE Linux Enterprise Server 15 SP5-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-4416 |
| SUSE Linux Enterprise Server 15 SP6-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-4416 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 |
| Patchnames: SUSE-SLE-Module-Public-Cloud-15-SP4-2026-4416 SUSE-SLE-Product-SLES_SAP-15-SP4-2026-4416 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 |
| Patchnames: SUSE-SLE-Module-Public-Cloud-15-SP5-2026-4416 SUSE-SLE-Product-SLES_SAP-15-SP5-2026-4416 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 |
| Patchnames: SUSE-SLE-Module-Public-Cloud-15-SP6-2026-4416 SUSE-SLE-Product-SLES_SAP-15-SP6-2026-4416 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP7 | python-anyio | Released |
| SUSE Linux Enterprise Module for Python 3 15 SP7 | python-anyio | Released |
| SUSE Linux Enterprise Server 15 SP7 | python-anyio | Released |
| SUSE Linux Enterprise Server 16.0 | python-anyio | In progress |
| SUSE Linux Enterprise Server 16.1 | python-anyio | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | python-anyio | Released |
| SUSE Linux Enterprise Server for SAP applications 16.0 | python-anyio | In progress |
| SUSE Linux Enterprise Server for SAP applications 16.1 | python-anyio | Affected |
| SUSE Linux Micro 6.0 | python-anyio | Affected |
| SUSE Linux Micro 6.1 | python-anyio | Affected |
| SUSE Linux Micro 6.2 | python-anyio | In progress |
| openSUSE Leap 16.0 | python-anyio | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | python-anyio | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | python-anyio | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | python-anyio | Released |
| SUSE Linux Enterprise Module for Public Cloud 15 SP4 | python-anyio | Released |
| SUSE Linux Enterprise Module for Public Cloud 15 SP5 | python-anyio | Released |
| SUSE Linux Enterprise Module for Python 3 15 SP4 | python-anyio | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP5 | python-anyio | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP6 | python-anyio | Affected |
| SUSE Linux Enterprise Server 15 SP4 | python-anyio | Released |
| SUSE Linux Enterprise Server 15 SP4-LTSS | python-anyio | Released |
| SUSE Linux Enterprise Server 15 SP5 | python-anyio | Released |
| SUSE Linux Enterprise Server 15 SP5-LTSS | python-anyio | Released |
| SUSE Linux Enterprise Server 15 SP6 | python-anyio | Released |
| SUSE Linux Enterprise Server 15 SP6-LTSS | python-anyio | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | python-anyio | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | python-anyio | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | python-anyio | Released |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise Desktop 15 SP4 | python-anyio | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | python-anyio | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | python-anyio | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | python-anyio | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | python-anyio | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | python-anyio | Released |
| SUSE Linux Enterprise Module for Public Cloud 15 SP6 | python-anyio | Released |
| SUSE Manager Proxy 4.3 | python-anyio | Released |
| SUSE Manager Retail Branch Server 4.3 | python-anyio | Released |
| SUSE Manager Server 4.3 | python-anyio | Released |
| openSUSE Leap 15.4 | python-anyio | Released |
| openSUSE Leap 15.5 | python-anyio | Affected |
| openSUSE Leap 15.6 | python-anyio | Affected |
| Products at an unknown state of their lifecycle. | ||
| SUSE Linux Enterprise Server for NVIDIA 16.1 | python-anyio | Affected |
SUSE Timeline for this CVE
CVE page created: Mon Sep 21 12:04:23 2026CVE page last modified: Fri Oct 2 20:46:23 2026