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CVE-2026-13322

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

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.

CVSS 3.1 · 3.8 Low EPSS < 1% KEV · Not listed
Vendors
Kubevirt Redhat
Products
Kubevirt Container Native Virtualization Openshift Virtualization
CVE-2026-13318

Virt-api-rhel9: kubevirt: kubevirt: ssrf in virt-api port-forward via unvalidated guest-agent-reported ip

A server-side request forgery (SSRF) flaw was found in KubeVirt's virt-api port-forward handler. When processing a port-forward request to a VirtualMachineInstance (VMI), virt-api reads the target IP from vmi.Status.Interfaces[0].IP and passes it directly to net.Dial() without validation. For VMIs using non-masquerade network bindings (bridge or secondary-only), this IP is reported by the QEMU guest agent running inside the VM and is fully controllable by the VM owner. An attacker with kubevirt.io:edit permissions can create a VM with a modified guest agent that reports an arbitrary IP address, then request port-forward to establish a bidirectional TCP tunnel from virt-api's cluster-internal network position to any routable destination, bypassing NetworkPolicy isolation.

CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Vendors
Kubevirt Redhat
Products
Kubevirt Container Native Virtualization Openshift Virtualization
CVE-2026-13208

Kubevirt: virt-handler-rhel9: kubevirt: virt-handler notify server trusts vmi identity from unauthenticated grpc request body

A flaw was found in KubeVirt's virt-handler domain notify server. The gRPC handlers for HandleDomainEvent and HandleK8SEvent derive the VMI identity (namespace/name) solely from the request body without validating it against the connection's origin. Each virt-launcher pod connects through a per-VMI pipe socket, but no identity tag is propagated from the pipe path to the server handlers. This allows a compromised virt-launcher process to send forged domain lifecycle events for any other VMI scheduled on the same node, causing virt-handler to erroneously update that VMI's state and disrupt its lifecycle management.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Kubevirt Redhat
Products
Kubevirt Container Native Virtualization Openshift Virtualization
CVE-2026-9804

Kubevirt: kubevirt: vmexport directory symlink escape enables exporter pod file read

A flaw was found in KubeVirt's virt-exportserver component. An attacker with specific namespace-level access can exploit a path traversal vulnerability in the VMExport directory endpoint. By placing a symbolic link (symlink) within an exported filesystem Persistent Volume Claim (PVC) that points outside its designated mount root, the attacker can read arbitrary files from the exporter pod's filesystem. This leads to information disclosure, potentially exposing sensitive data.

CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Container Native Virtualization Openshift Virtualization
CVE-2023-24540

Improper handling of JavaScript whitespace in html/template

Not all valid JavaScript whitespace characters are considered to be whitespace. Templates containing whitespace characters outside of the character set "\t\n\f\r\u0020\u2028\u2029" in JavaScript contexts that also contain actions may not be properly sanitized during execution.

CVSS 3.1 · 9.8 Critical EPSS 1.6% KEV · Not listed
Vendors
Golang Redhat
Products
Go Acm Advanced Cluster Security and 17 more
CVE-2026-7374

Kubevirt: kubevirt virt-handler: privilege escalation and node compromise via symlink following vulnerability

A flaw was found in KubeVirt's virt-handler component. This vulnerability allows an authenticated OpenShift user with edit permissions in a single namespace to exploit improper symlink validation when connecting to virtual machine console sockets. By replacing the console socket with a symlink to the host's container runtime (CRI-O) socket, an attacker can hijack virt-handler's privileged connection. This enables the attacker to access any Unix socket on the host, potentially leading to full control of the node and the entire cluster.

CVSS 3.1 · 9.9 Critical EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Container Native Virtualization Openshift Virtualization
CVE-2023-48795

ssh: Prefix truncation attack on Binary Packet Protocol (BPP)

The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted (from the extension negotiation message), and a client and server may consequently end up with a connection for which some security features have been downgraded or disabled, aka a Terrapin attack. This occurs because the SSH Binary Packet Protocol (BPP), implemented by these extensions, mishandles the handshake phase and mishandles use of sequence numbers. For example, there is an effective attack against SSH's use of ChaCha20-Poly1305 (and CBC with Encrypt-then-MAC). The bypass occurs in chacha20-poly1305@openssh.com and (if CBC is used) the -etm@openssh.com MAC algorithms. This also affects Maverick Synergy Java SSH API before 3.1.0-SNAPSHOT, Dropbear through 2022.83, Ssh before 5.1.1 in Erlang/OTP, PuTTY before 0.80, AsyncSSH before 2.14.2, golang.org/x/crypto before 0.17.0, libssh before 0.10.6, libssh2 through 1.11.0, Thorn Tech SFTP Gateway before 3.4.6, Tera Term before 5.1, Paramiko before 3.4.0, jsch before 0.2.15, SFTPGo before 2.5.6, Netgate pfSense Plus through 23.09.1, Netgate pfSense CE through 2.7.2, HPN-SSH through 18.2.0, ProFTPD before 1.3.8b (and before 1.3.9rc2), ORYX CycloneSSH before 2.3.4, NetSarang XShell 7 before Build 0144, CrushFTP before 10.6.0, ConnectBot SSH library before 2.2.22, Apache MINA sshd through 2.11.0, sshj through 0.37.0, TinySSH through 20230101, trilead-ssh2 6401, LANCOM LCOS and LANconfig, FileZilla before 3.66.4, Nova before 11.8, PKIX-SSH before 14.4, SecureCRT before 9.4.3, Transmit5 before 5.10.4, Win32-OpenSSH before 9.5.0.0p1-Beta, WinSCP before 6.2.2, Bitvise SSH Server before 9.32, Bitvise SSH Client before 9.33, KiTTY through 0.76.1.13, the net-ssh gem 7.2.0 for Ruby, the mscdex ssh2 module before 1.15.0 for Node.js, the thrussh library before 0.35.1 for Rust, and the Russh crate before 0.40.2 for Rust.

CVSS 3.1 · 5.9 Medium EPSS 93.5% KEV · Not listed
Vendors
9bis Apache Apple and 39 more
Products
Kitty Sshd Sshj and 74 more
CVE-2025-7195

Operator-sdk: privilege escalation due to incorrect permissions of /etc/passwd

Early versions of Operator-SDK provided an insecure method to allow operator containers to run in environments that used a random UID. Operator-SDK before 0.15.2 provided a script, user_setup, which modifies the permissions of the /etc/passwd file to 664 during build time. Developers who used Operator-SDK before 0.15.2 to scaffold their operator may still be impacted by this if the insecure user_setup script is still being used to build new container images. In affected images, the /etc/passwd file is created during build time with group-writable permissions and a group ownership of root (gid=0). An attacker who can execute commands within an affected container, even as a non-root user, may be able to leverage their membership in the root group to modify the /etc/passwd file. This could allow the attacker to add a new user with any arbitrary UID, including UID 0, leading to full root privileges within the container.

CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Acm Advanced Cluster Security Apicurio Registry and 10 more
CVE-2026-6383

Kubevirt: kubevirt: unauthorized subresource access due to improper rbac evaluation

A flaw was found in KubeVirt's Role-Based Access Control (RBAC) evaluation logic. The authorization mechanism improperly truncates subresource names, leading to incorrect permission evaluations. This allows authenticated users with specific custom roles to gain unauthorized access to subresources, potentially disclosing sensitive information or performing actions they are not permitted to do. Additionally, legitimate users may be denied access to resources.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Container Native Virtualization Openshift Virtualization
CVE-2025-14525

Kubevirt: kubevirt: vm administration denial of service via guest agent

A flaw was found in kubevirt. A user within a virtual machine (VM), if the guest agent is active, can exploit this by causing the agent to report an excessive number of network interfaces. This action can overwhelm the system's ability to store VM configuration updates, effectively blocking changes to the Virtual Machine Instance (VMI). This allows the VM user to restrict the VM administrator's ability to manage the VM, leading to a denial of service for administrative operations.

CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Container Native Virtualization
CVE-2023-45288

HTTP/2 CONTINUATION flood in net/http

An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request's headers exceed MaxHeaderBytes, no memory is allocated to store the excess headers, but they are still parsed. This permits an attacker to cause an HTTP/2 endpoint to read arbitrary amounts of header data, all associated with a request which is going to be rejected. These headers can include Huffman-encoded data which is significantly more expensive for the receiver to decode than for an attacker to send. The fix sets a limit on the amount of excess header frames we will process before closing a connection.

CVSS 3.1 · 7.5 High EPSS 89.5% KEV · Not listed
Vendors
Go Standard Library Golang Redhat
Products
Net\/http Http2 Acm and 30 more
CVE-2024-45338

Non-linear parsing of case-insensitive content in golang.org/x/net/html

An attacker can craft an input to the Parse functions that would be processed non-linearly with respect to its length, resulting in extremely slow parsing. This could cause a denial of service.

CVSS 3.1 · 5.3 Medium EPSS 1.1% KEV · Not listed
Vendors
Redhat
Products
Acm Advanced Cluster Security Ceph Storage and 24 more
CVE-2024-24791

Denial of service due to improper 100-continue handling in net/http

The net/http HTTP/1.1 client mishandled the case where a server responds to a request with an "Expect: 100-continue" header with a non-informational (200 or higher) status. This mishandling could leave a client connection in an invalid state, where the next request sent on the connection will fail. An attacker sending a request to a net/http/httputil.ReverseProxy proxy can exploit this mishandling to cause a denial of service by sending "Expect: 100-continue" requests which elicit a non-informational response from the backend. Each such request leaves the proxy with an invalid connection, and causes one subsequent request using that connection to fail.

CVSS 3.1 · 7.5 High EPSS 1.4% KEV · Not listed
Vendors
Go Standard Library Redhat
Products
Net\/http Amq Streams Ceph Storage and 17 more
CVE-2024-31420

Cnv: dos through repeatedly calling vm-dump-metrics until virt handler crashes

A NULL pointer dereference flaw was found in KubeVirt. This flaw allows an attacker who has access to a virtual machine guest on a node with DownwardMetrics enabled to cause a denial of service by issuing a high number of calls to vm-dump-metrics --virtio and then deleting the virtual machine.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Container Native Virtualization
CVE-2025-14459

Virt-cdi-controller: unauthorized pvc cloning via dataimportcron

A flaw was found in KubeVirt Containerized Data Importer (CDI). This vulnerability allows a user to clone PersistentVolumeClaims (PVCs) from unauthorized namespaces, resulting in unauthorized access to data via the DataImportCron PVC source mechanism.

CVSS 3.1 · 8.5 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Container Native Virtualization
CVE-2024-31419

Cnv: information disclosure through the usage of vm-dump-metrics

An information disclosure flaw was found in OpenShift Virtualization. The DownwardMetrics feature was introduced to expose host metrics to virtual machine guests and is enabled by default. This issue could expose limited host metrics of a node to any guest in any namespace without being explicitly enabled by an administrator.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Container Native Virtualization
CVE-2022-30633

Stack exhaustion when unmarshaling certain documents in encoding/xml

Uncontrolled recursion in Unmarshal in encoding/xml before Go 1.17.12 and Go 1.18.4 allows an attacker to cause a panic due to stack exhaustion via unmarshalling an XML document into a Go struct which has a nested field that uses the 'any' field tag.

CVSS 3.1 · 7.5 High EPSS 2.2% KEV · Not listed
Vendors
Golang Redhat
Products
Go Acm Application Interconnect and 11 more
CVE-2022-32148

Exposure of client IP addresses in net/http

Improper exposure of client IP addresses in net/http before Go 1.17.12 and Go 1.18.4 can be triggered by calling httputil.ReverseProxy.ServeHTTP with a Request.Header map containing a nil value for the X-Forwarded-For header, which causes ReverseProxy to set the client IP as the value of the X-Forwarded-For header.

CVSS 3.1 · 6.5 Medium EPSS 1.5% KEV · Not listed
Vendors
Golang Redhat
Products
Go Acm Application Interconnect and 16 more
CVE-2022-30629

Session tickets lack random ticket_age_add in crypto/tls

Non-random values for ticket_age_add in session tickets in crypto/tls before Go 1.17.11 and Go 1.18.3 allow an attacker that can observe TLS handshakes to correlate successive connections by comparing ticket ages during session resumption.

CVSS 3.1 · 3.1 Low EPSS 1.2% KEV · Not listed
Vendors
Golang Redhat
Products
Go Acm Ceph Storage and 12 more