CVE-2026-43254 ovpn: tcp - fix packet extraction from stream

In the Linux kernel, the following vulnerability has been resolved: ovpn: tcp - fix packet extraction from stream When processing TCP stream data in ovpntcprecv, we receive large cloned skbs from strprcv that may contain multiple coalesced packets. The current implementation has two bugs: 1. Head...

CVE-2026-43254

CVE-2026-43254: Linux kernel openvpn TCP stream handling corrected. Ovpn_tcp_recv now allocates a separate skb per packet and uses skb_copy_bits to copy only the packet payload, skipping the 2-byte length prefix; length checks guard allocation to prevent invalid skbs. This resolves header offset ...

CVE-2026-43254 ovpn: tcp - fix packet extraction from stream

In the Linux kernel, the following vulnerability has been resolved: ovpn: tcp - fix packet extraction from stream When processing TCP stream data in ovpntcprecv, we receive large cloned skbs from strprcv that may contain multiple coalesced packets. The current implementation has two bugs: 1. Head...

CVE-2026-43254

In the Linux kernel, the following vulnerability has been resolved: ovpn: tcp - fix packet extraction from stream When processing TCP stream data in ovpntcprecv, we receive large cloned skbs from strprcv that may contain multiple coalesced packets. The current implementation has two bugs: 1. Head...

PT-2026-37594

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the ovpn tcp recv function when processing TCP stream data. The implementation contains two primary flaws: a header offset overflow and unaligned protocol headers. The...

Linux Kernel Security Vulnerabilities

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from issues with header offset overflow and protocol header misalignment during the extraction of data...

EUVD-2026-27434

Tunnelblick is an open source graphic user interface for OpenVPN on macOS. In versions 3.3beta26 through 9.0beta01, any local user can read arbitrary root-owned files by exploiting a symlink following vulnerability in tunnelblick-helper, reachable through the world-accessible tunnelblickd Unix...

CVE-2026-31893

CVE-2026-31893 describes a symlink-following vulnerability in Tunnelblick on macOS. From versions 3.3beta26 through 9.0beta01, a local user can cause tunnelblick-helper to read a root-owned file by leveraging a symlink to a target file via the world-accessible tunnelblickd Unix socket (mode 0666)...

CVE-2026-31893 Tunnelblick arbitrary file read via symlink following in tunnelblickd

Tunnelblick is an open source graphic user interface for OpenVPN on macOS. In versions 3.3beta26 through 9.0beta01, any local user can read arbitrary root-owned files by exploiting a symlink following vulnerability in tunnelblick-helper, reachable through the world-accessible tunnelblickd Unix...

EUVD-2025-209639

RouterOS provides various services that rely on correct verification of client and server certificates to secure confidentiality and integrity of communications. This includes OpenVPN, CAPsMAN, Dot1x 802.1X, among others. The vulnerability lies in shared certificate validation logic which uses th...

CVE-2025-42611

RouterOS provides various services that rely on correct verification of client and server certificates to secure confidentiality and integrity of communications. This includes OpenVPN, CAPsMAN, Dot1x 802.1X, among others. The vulnerability lies in shared certificate validation logic which uses th...

CVE-2025-42611

CVE-2025-42611 : RouterOS provides multiple services (OpenVPN, CAPsMAN, Dot1x) that rely on certificate verification using a system-wide trusted store. The vulnerability stems from shared certificate validation logic that uses this store, allowing any CA in the trust store to be trusted across co...

CVE-2025-42611: Improper Certificate Validation

RouterOS provides various services that rely on correct verification of client and server certificates to secure confidentiality and integrity of communications. This includes OpenVPN, CAPsMAN, Dot1x 802.1X, among others. The vulnerability lies in shared certificate validation logic which uses th...

PT-2026-36997

Name of the Vulnerable Software and Affected Versions RouterOS affected versions not specified Description Shared certificate validation logic uses a system certificate store that is trusted equally by all system services. This creates a confusion of scope where any certificate authority in the...

Mikrotik RouterOS Trust Management Vulnerability

Mikrotik RouterOS is an operating system for network devices developed by the Latvian company Mikrotik. There is a vulnerability in MikroTik RouterOS’s trust management mechanism. This vulnerability stems from the shared certificate validation logic, which leads to scope confusion. As a result, a...

Tunnelblick security vulnerabilities

Tunnelblick is a graphical user interface tool for the OpenVPN client developed by Tunnelblick. There are security vulnerabilities in versions 3.3beta26 to 9.0beta01 of Tunnelblick. These vulnerabilities stem from a symbolic link follow-up vulnerability in tunnelblick-helper, which may allow any...

Fedora 42 : openvpn (2026-ddc5696c20)

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-ddc5696c20 advisory. Update to upstream OpenVPN 2.6.20 CVE-2026-40215 CVE-2026-35058 Tenable has extracted the preceding description block directly from the Fedora...

[SECURITY] Fedora 44 Update: openvpn-2.7.3-1.fc44

OpenVPN is a robust and highly flexible tunneling application that uses all of the encryption, authentication, and certification features of the OpenSSL library to securely tunnel IP networks over a single UDP or TCP port. It can use the Marcus Franz Xaver Johannes Oberhumers LZO library for...

Fedora 44 : openvpn (2026-086acf3001)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-086acf3001 advisory. Update to upstream 2.7.3 release ---- Update to upstream 2.7.2 release CVE-2026-40215 CVE-2026-35058 Tenable has extracted the preceding description...

CVE-2026-7242

A vulnerability was determined in Totolink A8000RU 7.1cu.643b20200521. Impacted is the function setOpenVpnClientCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument enabled can lead to os command injection. The attack may be performed from...