Memory Allocation Vulnerability in KubeVirt by Red Hat
CVE-2026-13322

3.8LOW

Key Information:

Vendor

Red Hat
Status
Red Hat Openshift Virtualization 4
Vendor
CVE Published:
26 June 2026

What is CVE-2026-13322?

A significant memory allocation flaw exists in KubeVirt's virtio-serial server component, which processes guest requests without a defined length limit. By exploiting this weakness, an attacker with access to a guest virtual machine can send a continuous stream of bytes to the device. This continuous input leads to unbounded memory consumption within the virt-handler process, ultimately resulting in an out-of-memory (OOM) condition. If exploited, this vulnerability could disrupt services by causing the affected processes to become unresponsive.

References

https://access.redhat.com/security/cve/CVE-2026-13322
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2492681
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
3.8
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was discovered by Huzaifa Sidhpurwala (Red Hat).
.