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TI-2026-11287 Aliases CVE-2026-13322GHSA-6f2p-2qg2-qqch

Kubevirt: virt-handler-rhel9: kubevirt: unbounded virtio-serial readline in virt-handler causes oom denial of service

Priority LOW 17CWE-770Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Deferred Red Hat: fix deferred

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-770.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00134 2nd percentileScored 2026-11-07
Fix Deferred Red Hat: fix deferred

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat OpenShift Virtualization 4——No fix listedCNA
Red HatRed Hat OpenShift Virtualization 4——No fix listedCNA
—github.com/kubevirt/kubevirt (Go)1.1.0-alpha.0 – 1.10.0-rc.0—No fix listedGHSA-6f2p-2qg2-qqch
  • Red Hat OpenShift Virtualization 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat OpenShift Virtualization 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • github.com/kubevirt/kubevirt (Go) Vendor— Affected 1.1.0-alpha.0 – 1.10.0-rc.0 Fixed in — No fix listed GHSA-6f2p-2qg2-qqch

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:redhat:openshift_virtualization:*:*:*:*:*:*:*:*4 – 4.22.0VulnerableRed Hat
cpe:2.3:a:kubevirt:kubevirt:-:*:*:*:*:kubernetes:*:*not specified by NVDVulnerablekubevirt
  • cpe:2.3:a:redhat:openshift_virtualization:*:*:*:*:*:*:*:* Versions 4 – 4.22.0 Vulnerable ·Red Hat
  • cpe:2.3:a:kubevirt:kubevirt:-:*:*:*:*:kubernetes:*:* Versions not specified by NVD Vulnerable ·kubevirt

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift Virtualization 4AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-13322
  2. 2026-10-03 Alias added: GHSA-6f2p-2qg2-qqch
  3. 2026-11-04 Affected versions changed · GHSA-6f2p-2qg2-qqch
  4. 2026-11-04 CVSS score added · GHSA-6f2p-2qg2-qqch
  5. 2026-11-04 Weakness changed · GHSA-6f2p-2qg2-qqch
  6. 2026-11-04 5 new references · GHSA-6f2p-2qg2-qqch

References

Advisory 3

Other 2

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2023-26623 The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6… CVSS 3.1MEDIUM 5.9
  • TI-2026-32429 Axios: Credential Theft and Response Hijacking via Prototype Pollution Gadget in Config Merge CVSS 3.1HIGH 7.7
  • TI-2026-23208 Immutable.js: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in immutable CVSS 4.0HIGH 8.7
  • TI-2020-11187 Improper privilege management in kubevirt CVSS 3.1CRITICAL 9.9
  • TI-2026-11209 Kubevirt: virt-handler-rhel9: kubevirt: safepath symlink following in virt-handler… CVSS 3.1HIGH 7.3
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences