Guannan Wang, Zhanpeng Liu, Guancheng Li, and Emma Reuter discovered that OpenVPN incorrectly handled suitably malformed packets with valid tls-crypt-v2 keys. An attacker could possibly use this issue to cause OpenVPN to crash, resulting in a denial of service. ( CVE-2026-35058 ) Guannan Wang, Zhanpeng Liu, and Guancheng Li discovered that OpenVPN had a race condition in the TLS handshake process that could leak packet data from a handshake under certain circumstances. An attacker could possibly use this issue to obtain sensitive information. ( CVE-2026-40215 )
Guannan Wang, Zhanpeng Liu, Guancheng Li, and Emma Reuter discovered that OpenVPN incorrectly handled suitably malformed packets with valid tls-crypt-v2 keys. An attacker could possibly use this issue to cause OpenVPN to crash, resulting in a denial of service. ( CVE-2026-35058 )
Guannan Wang, Zhanpeng Liu, and Guancheng Li discovered that OpenVPN had a race condition in the TLS handshake process that could leak packet data from a handshake under certain circumstances. An attacker could possibly use this issue to obtain sensitive information. ( CVE-2026-40215 )
Guannan Wang, Zhanpeng Liu, Guancheng Li, and Emma Reuter discovered that OpenVPN incorrectly handled suitably malformed packets with valid tls-crypt-v2 keys. An attacker could possibly use this issue to cause OpenVPN to crash, resulting in a denial of service. ( CVE-2026-35058 ) Guannan Wang, Zhanpeng Liu, and Guancheng Li discovered that OpenVPN had a race condition in the TLS handshake process that could leak packet data from a handshake under certain circumstances. An attacker could possibly use this issue to obtain sensitive information. ( CVE-2026-40215 )
Guannan Wang, Zhanpeng Liu, Guancheng Li, and Emma Reuter discovered that OpenVPN incorrectly handled suitably malformed packets with valid tls-crypt-v2 keys. An attacker could possibly use this issue to cause OpenVPN to crash, resulting in a denial of service. ( CVE-2026-35058 )
Guannan Wang, Zhanpeng Liu, and Guancheng Li discovered that OpenVPN had a race condition in the TLS handshake process that could leak packet data from a handshake under certain circumstances. An attacker could possibly use this issue to obtain sensitive information. ( CVE-2026-40215 )
In general, a standard system update will make all the necessary changes.
The problem can be corrected by updating your system to the following package versions:
Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.
The full story
This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.
