CVE-2026-13322
Last modified
CVE-2026-13322 is a low-severity vulnerability rated 3.8/10 on the CVSS scale. 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. EPSS estimates a 0.10% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Openshift Virtualization | >= 4, <= 4.22.0 |
| Kubevirt | Kubevirt | All versions |
References
- https://access.redhat.com/security/cve/CVE-2026-13322Mitigation, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2492681Issue Tracking, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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