How severe is CVE-2026-13322?

CVE-2026-13322 has a CVSS 3.x base score of 3.8, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-13322 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-13322?

CVE-2026-13322 primarily affects Redhat Openshift Virtualization. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-13322?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-13322 have an EU (EUVD) identifier?

Yes. CVE-2026-13322 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39599.

When was CVE-2026-13322 published?

CVE-2026-13322 was published on 2026-06-26 and last updated on 2026-07-06.

CVE-2026-13322

CVE-2026-13322 is a low-severity vulnerability in Redhat Openshift Virtualization with a CVSS 3.x base score of 3.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: Low (CVSS 3.x base score 3.8)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39599
Weakness: CWE-770
Affected product: Redhat Openshift Virtualization
Published: 2026-06-26
Last modified: 2026-07-06

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.

Frequently asked questions

What is CVE-2026-13322?: 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.
How severe is CVE-2026-13322?: CVE-2026-13322 has a CVSS 3.x base score of 3.8, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-13322 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-13322?: CVE-2026-13322 primarily affects Redhat Openshift Virtualization. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-13322?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-13322 have an EU (EUVD) identifier?: Yes. CVE-2026-13322 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39599.
When was CVE-2026-13322 published?: CVE-2026-13322 was published on 2026-06-26 and last updated on 2026-07-06.

References

Affected products (2)

cpe:2.3:a:redhat:openshift_virtualization:*:*:*:*:*:*:*:*
cpe:2.3:a:kubevirt:kubevirt:-:*:*:*:*:kubernetes:*:*

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