Upstream information
Description
pycares is a Python module which provides an interface to c-ares. c-ares is a C library that performs DNS requests and name resolutions asynchronously. Prior to version 4.9.0, pycares is vulnerable to a use-after-free condition that occurs when a Channel object is garbage collected while DNS queries are still pending. This results in a fatal Python error and interpreter crash. The vulnerability has been fixed in pycares 4.9.0 by implementing a safe channel destruction mechanism.SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having moderate severity.
| SUSE | |
|---|---|
| Base Score | 5.9 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality Impact | None |
| Integrity Impact | Low |
| Availability Impact | High |
| CVSSv3 Version | 3.1 |
| CNA (GitHub) | SUSE | |
|---|---|---|
| Base Score | 8.2 | 6 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/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:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N |
| Attack Vector | Network | Network |
| Attack Complexity | Low | High |
| Attack Requirements | Present | Present |
| Privileges Required | None | Low |
| User Interaction | None | None |
| Vulnerable System Confidentiality Impact | None | None |
| Vulnerable System Integrity Impact | None | Low |
| 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-2025:03354-1, published 2025-09-25T13:30:03Z
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| SUSE Linux Enterprise Desktop 15 SP6 SUSE Linux Enterprise High Performance Computing 15 SP6 SUSE Linux Enterprise Module for Python 3 15 SP6 SUSE Linux Enterprise Server 15 SP6 SUSE Linux Enterprise Server for SAP Applications 15 SP6 |
| Patchnames: SUSE-SLE-Module-Python3-15-SP6-2025-3354 |
| SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 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-SP7-2025-3354 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP4-ESPOS-2025-3354 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP4-LTSS-2025-3354 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP5-ESPOS-2025-3354 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP5-LTSS-2025-3354 |
| SUSE Linux Enterprise Server 15 SP4-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP4-LTSS-2025-3354 |
| SUSE Linux Enterprise Server 15 SP5-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP5-LTSS-2025-3354 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 |
| Patchnames: SUSE-SLE-Product-SLES_SAP-15-SP4-2025-3354 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 |
| Patchnames: SUSE-SLE-Product-SLES_SAP-15-SP5-2025-3354 |
| SUSE Package Hub 15 SP6 |
| Patchnames: openSUSE-2025-268 |
| openSUSE Leap 15.6 |
| Patchnames: openSUSE-2025-268 openSUSE-SLE-15.6-2025-3354 |
| openSUSE Tumbleweed |
| Patchnames: openSUSE-Tumbleweed-2025-15324 |
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 SP6 | python-pycares | Released |
| SUSE Linux Enterprise Desktop 15 SP7 | python-pycares | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | python-pycares | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | python-pycares | Released |
| SUSE Linux Enterprise Module for Python 3 15 SP6 | python-pycares | Released |
| SUSE Linux Enterprise Module for Python 3 15 SP7 | python-pycares | Released |
| SUSE Linux Enterprise Server 15 SP6 | python-pycares | Released |
| SUSE Linux Enterprise Server 15 SP7 | python-pycares | Released |
| SUSE Linux Enterprise Server 16.0 | python-pycares | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | python-pycares | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | python-pycares | Released |
| SUSE Linux Enterprise Server for SAP Applications 16.0 | python-pycares | Affected |
| SUSE Package Hub 15 SP6 | python3-pycares | Released |
| openSUSE Leap 15.6 | python-pycares | Released |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | python-pycares | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | python-pycares | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | python-pycares | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | python-pycares | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | python-pycares | Released |
| SUSE Linux Enterprise Module for Python 3 15 SP4 | python-pycares | Affected |
| SUSE Linux Enterprise Module for Python 3 15 SP5 | python-pycares | Affected |
| SUSE Linux Enterprise Server 15 SP4 | python-pycares | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | python-pycares | Released |
| SUSE Linux Enterprise Server 15 SP5 | python-pycares | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | python-pycares | Released |
| SUSE Manager Proxy 4.3 | python-pycares | Affected |
| SUSE Manager Retail Branch Server 4.3 | python-pycares | Affected |
| SUSE Manager Server 4.3 | python-pycares | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise Desktop 15 SP4 | python-pycares | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | python-pycares | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | python-pycares | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | python-pycares | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | python-pycares | Released |
| openSUSE Leap 15.4 | python-pycares | Released |
| openSUSE Leap 15.5 | python-pycares | Affected |
SUSE Timeline for this CVE
CVE page created: Tue Jun 17 08:00:24 2025CVE page last modified: Fri Sep 26 13:05:14 2025