------------------------------------------------------------------------- Debian LTS Advisory DLA-4653-1 debian-lts@lists.debian.org https://www.debian.org/lts/security/ Daniel Leidert June 27, 2026 https://wiki.debian.org/LTS ------------------------------------------------------------------------- Package : openvpn Version : 2.5.1-3+deb11u3 CVE ID : CVE-2026-35058 CVE-2026-40215 Two security vulnerabilities were discovered in OpenVPN, a virtual private network application. CVE-2026-35058 Improper validation of packet length during tls-crypt-v2 key extraction allows authenticated attackers to trigger a fatal assertion and cause a denial of service via a specially crafted packet. CVE-2026-40215 A race condition allows remote attackers to potentially cause a server crash or leak heap memory via a use-after-free triggered during TLS session promotion. For Debian 11 bullseye, these problems have been fixed in version 2.5.1-3+deb11u3. We recommend that you upgrade your openvpn packages. For the detailed security status of openvpn please refer to its security tracker page at: https://security-tracker.debian.org/tracker/openvpn Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS
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