SB20260612114 - openEuler 20.03 LTS SP4 update for openvpn

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Main Vulnerability Database SB20260612114

SB20260612114 - openEuler 20.03 LTS SP4 update for openvpn

Published: June 12, 2026

Security Bulletin ID SB20260612114
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-40215)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a remote attacker to disclose packet data from a previous handshake.

The vulnerability exists due to a race condition in the TLS handshake handling when processing reconnecting sessions. A remote attacker can trigger repeated handshake activity to disclose packet data from a previous handshake.

This occurs only under specific circumstances involving replacement of an old TLS session by a new session while stale session state still attempts to send a packet.


Remediation

Install update from vendor's website.

References