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CVE-2018-20843

expat: large number of colons in input makes parser consume high amount of resources, leading to DoS

In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).

CVSS 3.1 · 7.5 High EPSS 7.1% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 5 more
Products
Ubuntu Linux Debian Linux Fedora and 9 more
CVE-2026-54100

Windows-machine-config-operator: windows-machine-config-operator: ssh host key not verified enables credential theft

A flaw was found in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform. WMCO establishes SSH connections to Windows worker nodes without verifying the remote server host key. An adjacent-network attacker who can intercept or redirect WMCO's SSH session can capture WICD and kubelet bootstrap credentials transferred during node configuration, enabling compromise of Windows node identities in the cluster.

CVSS 3.1 · 8.3 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Openshift Openshift Container Platform Openshift For Windows Containers and 2 more
CVE-2024-12085

Rsync: info leak via uninitialized stack contents

A flaw was found in rsync which could be triggered when rsync compares file checksums. This flaw allows an attacker to manipulate the checksum length (s2length) to cause a comparison between a checksum and uninitialized memory and leak one byte of uninitialized stack data at a time.

CVSS 3.1 · 7.5 High EPSS 8.6% KEV · Not listed
Vendors
Almalinux Archlinux Gentoo and 5 more
Products
Almalinux Arch Linux Linux and 26 more
CVE-2026-13201

Kubevirt: virt-handler-rhel9: kubevirt: safepath symlink following in virt-handler enables notify socket hijacking and node-level vm disruption

A flaw was found in KubeVirt's safepath package used by virt-handler. The OpenAtNoFollow function uses O_PATH|O_NOFOLLOW to obtain a file descriptor to a path leaf, but downstream operations resolve the path via /proc/self/fd/N using link-following syscalls. When the leaf is a symlink, the kernel dereferences it, defeating the intended no-follow protection. An attacker with access to a virt-launcher pod can exploit this to redirect virt-handler's IPC socket connections, including the notify socket used for VM domain lifecycle events. By hijacking this socket, the attacker can inject arbitrary domain events into virt-handler, causing it to take incorrect lifecycle actions, corrupt VM state in the Kubernetes API, or crash — resulting in sustained denial of VM management services for all virtual machines on the affected node. Additionally, the same symlink following flaw allows virt-handler to apply file ownership or permission changes to unintended host paths.

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
Vendors
Kubevirt Redhat
Products
Kubevirt Container Native Virtualization Openshift Virtualization
CVE-2026-76061

Cri-o: cri-o: bind_mount_prefix intermediate-symlink prefix bypass

A flaw was found in CRI-O's `bind_mount_prefix` handling. When configured with a non-empty `bind_mount_prefix`, a malicious container or local attacker could use a Container Runtime Interface (CRI) hostPath containing an intermediate absolute symlink. This could cause the bind mount source to resolve outside the intended prefixed root, potentially leading to unauthorized access to files or privilege escalation on the host system.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Cri-o Redhat
Products
Cri-o Openshift Openshift Container Platform
CVE-2022-32189

Panic when decoding Float and Rat types in math/big

A too-short encoded message can cause a panic in Float.GobDecode and Rat GobDecode in math/big in Go before 1.17.13 and 1.18.5, potentially allowing a denial of service.

CVSS 3.1 · 7.5 High EPSS 2.8% KEV · Not listed
Vendors
Golang Redhat
Products
Go Ceph Storage Container Native Virtualization and 10 more
CVE-2021-44533

nodejs: Incorrect handling of certificate subject and issuer fields

Node.js < 12.22.9, < 14.18.3, < 16.13.2, and < 17.3.1 did not handle multi-value Relative Distinguished Names correctly. Attackers could craft certificate subjects containing a single-value Relative Distinguished Name that would be interpreted as a multi-value Relative Distinguished Name, for example, in order to inject a Common Name that would allow bypassing the certificate subject verification.Affected versions of Node.js that do not accept multi-value Relative Distinguished Names and are thus not vulnerable to such attacks themselves. However, third-party code that uses node's ambiguous presentation of certificate subjects may be vulnerable.

CVSS 3.1 · 5.3 Medium EPSS 9.4% KEV · Not listed
Vendors
Debian Nodejs Oracle and 1 more
Products
Debian Linux Node.js Graalvm and 11 more
CVE-2021-41079

Apache Tomcat DoS with unexpected TLS packet

Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets. When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service.

CVSS 3.1 · 7.5 High EPSS 7.2% KEV · Not listed
Vendors
Apache Debian Netapp and 1 more
Products
Tomcat Debian Linux Management Services For Element Software And Netapp Hci and 3 more
CVE-2021-37137

netty-codec: SnappyFrameDecoder doesn't restrict chunk length and may buffer skippable chunks in an unnecessary way

The Snappy frame decoder function doesn't restrict the chunk length which may lead to excessive memory usage. Beside this it also may buffer reserved skippable chunks until the whole chunk was received which may lead to excessive memory usage as well. This vulnerability can be triggered by supplying malicious input that decompresses to a very big size (via a network stream or a file) or by sending a huge skippable chunk.

CVSS 3.1 · 7.5 High EPSS 6.6% KEV · Not listed
Vendors
Debian Netapp Netty and 3 more
Products
Debian Linux Oncommand Insight Netty and 21 more
CVE-2021-37136

netty-codec: Bzip2Decoder doesn't allow setting size restrictions for decompressed data

The Bzip2 decompression decoder function doesn't allow setting size restrictions on the decompressed output data (which affects the allocation size used during decompression). All users of Bzip2Decoder are affected. The malicious input can trigger an OOME and so a DoS attack

CVSS 3.1 · 7.5 High EPSS 5.9% KEV · Not listed
Vendors
Debian Netapp Netty and 3 more
Products
Debian Linux Oncommand Insight Netty and 28 more
CVE-2021-33037

Incorrect Transfer-Encoding handling with HTTP/1.0

Apache Tomcat 10.0.0-M1 to 10.0.6, 9.0.0.M1 to 9.0.46 and 8.5.0 to 8.5.66 did not correctly parse the HTTP transfer-encoding request header in some circumstances leading to the possibility to request smuggling when used with a reverse proxy. Specifically: - Tomcat incorrectly ignored the transfer encoding header if the client declared it would only accept an HTTP/1.0 response; - Tomcat honoured the identify encoding; and - Tomcat did not ensure that, if present, the chunked encoding was the final encoding.

CVSS 3.1 · 5.3 Medium EPSS 74.7% KEV · Not listed
Vendors
Apache Debian Mcafee and 2 more
Products
Tomcat Tomee Debian Linux and 22 more
CVE-2021-25122

Apache Tomcat h2c request mix-up

When responding to new h2c connection requests, Apache Tomcat versions 10.0.0-M1 to 10.0.0, 9.0.0.M1 to 9.0.41 and 8.5.0 to 8.5.61 could duplicate request headers and a limited amount of request body from one request to another meaning user A and user B could both see the results of user A's request.

CVSS 3.1 · 7.5 High EPSS 18.1% KEV · Not listed
Vendors
Apache Debian Oracle and 1 more
Products
Tomcat Debian Linux Agile Product Lifecycle Management and 12 more
CVE-2021-21409

Possible request smuggling in HTTP/2 due missing validation of content-length

Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty (io.netty:netty-codec-http2) before version 4.1.61.Final there is a vulnerability that enables request smuggling. The content-length header is not correctly validated if the request only uses a single Http2HeaderFrame with the endStream set to to true. This could lead to request smuggling if the request is proxied to a remote peer and translated to HTTP/1.1. This is a followup of GHSA-wm47-8v5p-wjpj/CVE-2021-21295 which did miss to fix this one case. This was fixed as part of 4.1.61.Final.

CVSS 3.1 · 5.9 Medium EPSS 4.9% KEV · Not listed
Vendors
Debian Netapp Netty and 3 more
Products
Debian Linux Oncommand Api Services Oncommand Workflow Automation and 26 more
CVE-2021-21295

Possible request smuggling in HTTP/2 due missing validation

Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty (io.netty:netty-codec-http2) before version 4.1.60.Final there is a vulnerability that enables request smuggling. If a Content-Length header is present in the original HTTP/2 request, the field is not validated by `Http2MultiplexHandler` as it is propagated up. This is fine as long as the request is not proxied through as HTTP/1.1. If the request comes in as an HTTP/2 stream, gets converted into the HTTP/1.1 domain objects (`HttpRequest`, `HttpContent`, etc.) via `Http2StreamFrameToHttpObjectCodec `and then sent up to the child channel's pipeline and proxied through a remote peer as HTTP/1.1 this may result in request smuggling. In a proxy case, users may assume the content-length is validated somehow, which is not the case. If the request is forwarded to a backend channel that is a HTTP/1.1 connection, the Content-Length now has meaning and needs to be checked. An attacker can smuggle requests inside the body as it gets downgraded from HTTP/2 to HTTP/1.1. For an example attack refer to the linked GitHub Advisory. Users are only affected if all of this is true: `HTTP2MultiplexCodec` or `Http2FrameCodec` is used, `Http2StreamFrameToHttpObjectCodec` is used to convert to HTTP/1.1 objects, and these HTTP/1.1 objects are forwarded to another remote peer. This has been patched in 4.1.60.Final As a workaround, the user can do the validation by themselves by implementing a custom `ChannelInboundHandler` that is put in the `ChannelPipeline` behind `Http2StreamFrameToHttpObjectCodec`.

CVSS 3.1 · 5.9 Medium EPSS 18.9% KEV · Not listed
Vendors
Apache Debian Netapp and 4 more
Products
Kudu Zookeeper Debian Linux and 16 more
CVE-2021-21290

Local Information Disclosure Vulnerability in Netty on Unix-Like systems due temporary files

Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty before version 4.1.59.Final there is a vulnerability on Unix-like systems involving an insecure temp file. When netty's multipart decoders are used local information disclosure can occur via the local system temporary directory if temporary storing uploads on the disk is enabled. On unix-like systems, the temporary directory is shared between all user. As such, writing to this directory using APIs that do not explicitly set the file/directory permissions can lead to information disclosure. Of note, this does not impact modern MacOS Operating Systems. The method "File.createTempFile" on unix-like systems creates a random file, but, by default will create this file with the permissions "-rw-r--r--". Thus, if sensitive information is written to this file, other local users can read this information. This is the case in netty's "AbstractDiskHttpData" is vulnerable. This has been fixed in version 4.1.59.Final. As a workaround, one may specify your own "java.io.tmpdir" when you start the JVM or use "DefaultHttpDataFactory.setBaseDir(...)" to set the directory to something that is only readable by the current user.

CVSS 3.1 · 6.2 Medium EPSS 1.8% KEV · Not listed
Vendors
Debian Netapp Netty and 3 more
Products
Debian Linux Active Iq Unified Manager Cloud Secure Agent and 24 more