Upstream information
Description
A flaw was found in KubeVirt's downward metrics virtio-serial server. The server reads guest requests using textproto.Reader.ReadLine(), which buffers input indefinitely until a newline character is received, with no length limit or read deadline. A user with access to a VM guest that has the downward metrics virtio-serial device configured can write a continuous byte stream to the device, causing unbounded memory allocation in the virt-handler process until it is OOM-killed.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having moderate severity.
| CVSS detail | CNA (Red Hat) | SUSE |
|---|---|---|
| Base Score | 3.8 | 3.8 |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L |
| Attack Vector | Local | Local |
| Attack Complexity | Low | Low |
| Privileges Required | Low | Low |
| User Interaction | None | None |
| Scope | Changed | Changed |
| Confidentiality Impact | None | None |
| Integrity Impact | None | None |
| Availability Impact | Low | Low |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | SUSE |
|---|---|
| Base Score | 4.8 |
| Vector | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L |
| Attack Vector | Local |
| Attack Complexity | Low |
| Attack Requirements | None |
| Privileges Required | Low |
| User Interaction | None |
| Vulnerable System Confidentiality Impact | None |
| Vulnerable System Integrity Impact | None |
| Vulnerable System Availability Impact | Low |
| Subsequent System Confidentiality Impact | None |
| Subsequent System Integrity Impact | None |
| Subsequent System Availability Impact | Low |
| CVSSv4 Version | 4.0 |
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Please note that this evaluation state might be work in progress, incomplete or outdated.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 High Performance Computing 15 SP7 | kubevirt | Affected |
| SUSE Linux Enterprise Micro 5.3 | kubevirt | Affected |
| SUSE Linux Enterprise Micro 5.4 | kubevirt | Affected |
| SUSE Linux Enterprise Micro 5.5 | kubevirt | Affected |
| SUSE Linux Enterprise Module for Containers 15 SP7 | kubevirt | Affected |
| SUSE Linux Enterprise Server 15 SP7 | kubevirt | Affected |
| SUSE Linux Enterprise Server 16.0 | kubevirt | Affected |
| SUSE Linux Enterprise Server 16.1 | kubevirt | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | kubevirt | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | kubevirt | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | kubevirt | Affected |
| SUSE Linux Micro 6.0 | kubevirt | Affected |
| SUSE Linux Micro 6.1 | kubevirt | Affected |
| SUSE Linux Micro 6.2 | kubevirt | Affected |
| openSUSE Leap 16.0 | kubevirt | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4 | kubevirt | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | kubevirt | Affected |
| SUSE Linux Enterprise Module for Containers 15 SP4 | kubevirt | Affected |
| SUSE Linux Enterprise Module for Containers 15 SP5 | kubevirt | Affected |
| SUSE Linux Enterprise Server 15 SP4 | kubevirt | Affected |
| SUSE Linux Enterprise Server 15 SP5 | kubevirt | Affected |
| SUSE Manager Proxy 4.3 | kubevirt | Affected |
| SUSE Manager Retail Branch Server 4.3 | kubevirt | Affected |
| SUSE Manager Server 4.3 | kubevirt | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | kubevirt | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | kubevirt | Affected |
| openSUSE Leap 15.4 | kubevirt | Affected |
| openSUSE Leap 15.5 | kubevirt | Affected |
| openSUSE Leap Micro 5.3 | kubevirt | Affected |
| openSUSE Leap Micro 5.4 | kubevirt | Affected |
| openSUSE Leap Micro 5.5 | kubevirt | Affected |
| Products at an unknown state of their lifecycle. | ||
| SUSE Linux Micro Extras 6.0 | kubevirt | Affected |
| SUSE Linux Micro Extras 6.1 | kubevirt | Affected |
| SUSE Linux Micro Extras 6.2 | kubevirt | Affected |
SUSE Timeline for this CVE
CVE page created: Fri Jun 26 02:24:51 2026CVE page last modified: Fri Jun 26 19:38:58 2026