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Package "openvpn"

Name: openvpn

Description:

virtual private network daemon
Latest version: 2.6.19-0ubuntu0.24.04.5
Release: noble (24.04)
Level: security
Repository: main
Homepage: https://openvpn.net/

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Other versions of "openvpn" in Noble

Repository Area Version
base main 2.6.9-1ubuntu4
updates main 2.6.19-0ubuntu0.24.04.4

Changelog

Version: 2.6.19-0ubuntu0.24.04.5 2026-10-22 16:07:31 UTC

openvpn (2.6.19-0ubuntu0.24.04.5) noble-security; urgency=medium

  * SECURITY UPDATE: impersonation via certificate subject field
    - debian/patches/CVE-2026-84790.patch: Check for null-bytes in certificate
      subjects in src/openvpn/ssl_verify_mbedtls.c,
      src/openvpn/ssl_verify_openssl.c.
    - CVE-2026-84790

 -- Marc Deslauriers Wed, 14 Oct 2026 11:37:52 -0400
Source diff to previous version
CVE-2026-84790 OpenVPN 2.7_alpha1 through 2.7.7 allows remote authenticated users to impersonate others via a crafted certificate subject field

Version: 2.6.19-0ubuntu0.24.04.4 2026-09-30 15:07:18 UTC

openvpn (2.6.19-0ubuntu0.24.04.4) noble-security; urgency=medium

  * SECURITY UPDATE: use-after-free in TLS Session Handling
    - debian/patches/CVE-2026-84471.patch: Move check_session_buf_not_used
      method into the method that free the buffer in src/openvpn/ssl.c.
    - CVE-2026-84471
  * SECURITY UPDATE: DoS via crafted inputs
    - debian/patches/CVE-2026-84732-1.patch: Avoid unbounded reliable TLS
      timeout in src/openvpn/options.c, src/openvpn/reliable.c,
      src/openvpn/reliable.h.
    - debian/patches/CVE-2026-84732-2.patch: Ignore acks for packets that cannot
      be outstanding in src/openvpn/reliable.c, src/openvpn/reliable.h,
      tests/unit_tests/openvpn/test_packet_id.c.
    - CVE-2026-84732

 -- Marc Deslauriers Wed, 23 Sep 2026 11:26:22 -0400
Source diff to previous version
CVE-2026-84732 Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted

Version: 2.6.19-0ubuntu0.24.04.3 2026-07-14 17:08:01 UTC

  openvpn (2.6.19-0ubuntu0.24.04.3) noble-security; urgency=medium

  * SECURITY UPDATE: buffer overrun via NTLMv2 proxy responses
    - debian/patches/CVE-2026-11771.patch: Fix 1-byte buffer overrun on NTLMv2
      proxy responses. in src/openvpn/ntlm.c.
    - CVE-2026-11771
  * SECURITY UPDATE: metadata buffer leak
    - debian/patches/CVE-2026-12932-pre1.patch: Zeroize tls-crypt-v2 client
      keys in src/openvpn/ssl_pkt.c, src/openvpn/tls_crypt.c.
    - debian/patches/CVE-2026-12932.patch: Clean up metadata handling in
      tls_crypt_v2_extract_client_key in src/openvpn/ssl.h,
      src/openvpn/ssl_common.h, src/openvpn/ssl_pkt.c, src/openvpn/tls_crypt.c,
      tests/unit_tests/openvpn/test_tls_crypt.c.
    - CVE-2026-12932
  * SECURITY UPDATE: ack_write_buf use after free
    - debian/patches/CVE-2026-12996.patch: Fix ack_write_buf use after free in
      src/openvpn/ssl.c.
    - CVE-2026-12996
  * SECURITY UPDATE: tls_wrap_reneg use after free
    - debian/patches/CVE-2026-13117.patch: Fix tls_wrap_reneg use after free in
      src/openvpn/ssl.c.
    - CVE-2026-13117
  * SECURITY UPDATE: DoS via malformed authentication token
    - debian/patches/CVE-2026-13122.patch: Ensure we only get the session from
      valid tokens for external-auth in doc/man-sections/server-options.rst,
      src/openvpn/auth_token.c, src/openvpn/auth_token.h,
      src/openvpn/ssl_verify.c, tests/unit_tests/openvpn/test_auth_token.c.
    - CVE-2026-13122
  * SECURITY UPDATE: DoS via memory leak with valid tls-crypt-v2 client key
    - debian/patches/CVE-2026-13698.patch: Ensure tls-crypt keys are not setup
      twice in src/openvpn/ssl.c, src/openvpn/ssl.h, src/openvpn/ssl_pkt.c,
      src/openvpn/ssl_pkt.h, src/openvpn/tls_crypt.c, src/openvpn/tls_crypt.h,
      tests/unit_tests/openvpn/test_tls_crypt.c.
    - CVE-2026-13698

 -- Marc Deslauriers <email address hidden> Tue, 07 Jul 2026 19:00:45 -0400
Source diff to previous version
CVE-2026-13122 OpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a malformed authentication
CVE-2026-13698 A memory leak in OpenVPN version 2.5.0 through 2.5.11, 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers with a valid tls-cry

Version: 2.6.19-0ubuntu0.24.04.2 2026-05-20 14:07:35 UTC

  openvpn (2.6.19-0ubuntu0.24.04.2) noble-security; urgency=medium

  * SECURITY UPDATE: server ASSERT() via malformed packet
    - debian/patches/CVE-2026-35058.patch: avoid interpreting opcode as
      part of WKc in src/openvpn/tls_crypt.c,
      tests/unit_tests/openvpn/test_tls_crypt.c.
    - CVE-2026-35058
  * SECURITY UPDATE: race condition in TLS handshake
    - debian/patches/CVE-2026-40215.patch: ensure that buffer of freed
      session are not used in src/openvpn/ssl.c.
    - CVE-2026-40215

 -- Marc Deslauriers <email address hidden> Thu, 23 Apr 2026 09:09:25 -0400
Source diff to previous version

Version: 2.6.14-0ubuntu0.24.04.3 2025-11-27 19:55:36 UTC

  openvpn (2.6.14-0ubuntu0.24.04.3) noble-security; urgency=medium

  * SECURITY UPDATE: incorrect HMAC verification check
    - debian/patches/CVE-2025-13086.patch: fix memcmp check for the hmac
      verification in the 3way handshake being inverted in
      src/openvpn/ssl_pkt.c, tests/unit_tests/openvpn/test_pkt.c.
    - CVE-2025-13086

 -- Marc Deslauriers <email address hidden> Mon, 24 Nov 2025 17:32:32 -0500
CVE-2025-13086 HMAC verification check: fix incorrect memcmp() call


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