Upstream information
Description
python-socketio is a Python implementation of the Socket.IO realtime client and server. The python-socketio server stores binary `EVENT` and `ACK` messages in memory while it waits to receive their binary attachments. Once all the attachments are received, these messages are then processed. Prior to version 5.16.4, an attacker can submit a binary message and intentionally omit sending one or more of its attachments to cause the message along with the partial list of received attachments to stay in memory for a long time. Version 5.16.4 takes the following measures to address this issue: Binary packets are only accepted from authenticated clients and, when a client disconnects, the server checks if there is a partial binary message being held for the client and deletes it.SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having important severity.
| CVSS detail | CNA (GitHub) | SUSE |
|---|---|---|
| Base Score | 7.5 | 7.5 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Network | Network |
| Attack Complexity | Low | Low |
| Privileges Required | None | None |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | None | None |
| Integrity Impact | None | None |
| Availability Impact | High | High |
| CVSSv3 Version | 3.1 | 3.1 |
SUSE Security Advisories:
- SUSE-SU-2026:3086-1, published 2026-07-16T17:53:06Z
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| 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-SP7-2026-3086 |
| SUSE Linux Enterprise Server 15 SP6-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-3086 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 |
| Patchnames: SUSE-SLE-Product-SLES_SAP-15-SP6-2026-3086 |
| openSUSE Tumbleweed |
| Patchnames: openSUSE-Tumbleweed-2026-11171 |
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Please note that this evaluation state might be work in progress, incomplete or outdated.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-python-socketio | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | python-python-socketio | Released |
| SUSE Linux Enterprise Module for Python 3 15 SP7 | python-python-socketio | Released |
| SUSE Linux Enterprise Server 15 SP7 | python-python-socketio | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | python-python-socketio | Released |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise Module for Python 3 15 SP6 | python-python-socketio | Affected |
| SUSE Linux Enterprise Server 15 SP6 | python-python-socketio | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | python-python-socketio | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | python-python-socketio | Released |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise Desktop 15 SP6 | python-python-socketio | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | python-python-socketio | Affected |
| openSUSE Leap 15.6 | python-python-socketio | Released |
SUSE Timeline for this CVE
CVE page created: Sat Jun 27 00:00:30 2026CVE page last modified: Wed Aug 12 12:01:58 2026