Microsoft security update for CVE-2026-13322 — azl3 kubevirt
🔗 CVE IDs covered (1)
📋 Microsoft's advisory
EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-13322. This page also shows what EchelonGraph holds for CVE-2026-13322, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.
🎯 Affected products5
- azl3 kubevirt 1.7.1-7 on Azure Linux 3.0
- azl3 kubevirt 1.7.1-8 on Azure Linux 3.0
- azl3 kubevirt 1.8.4-1 on Azure Linux 3.0
- azl3 kubevirt 1.8.4-2 on Azure Linux 3.0
- azl3 kubevirt 1.8.4-4 on Azure Linux 3.0
✅ Updates Microsoft lists: 2 updates
2 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.
| KB article | Update | Fixed build |
|---|---|---|
| — | Security Update | — |
| — | Security Update | — |
🧭 EchelonGraph on CVE-2026-13322
- EchelonGraph score
- 3.8 LOW
- CISA KEV
- Not listed
- Fix status
- A fix is available — apply it.
Description from the CVE record (CVE.org), as published by its numbering authority
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.
Published by Red Hat, Inc., the CVE Numbering Authority that assigned CVE-2026-13322, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).