OpenVPN 2.5.x-2.7.x TLS-crypt-v2 Client Key Extraction Mem Leak (remote DOS)
CVE-2026-12932 Published on July 30, 2026
A memory leak in the tls-crypt-v2 client key extraction in OpenVPN 2.5.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service (memory exhaustion) via a flood of crafted packets
Vulnerability Analysis
CVE-2026-12932 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Memory Leak Vulnerability?
The software does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is often triggered by improper handling of malformed data or unexpectedly interrupted sessions. In some languages, developers are responsible for tracking memory allocation and releasing the memory. If there are no more pointers or references to the memory, then it can no longer be tracked and identified for release.
CVE-2026-12932 has been classified to as a Memory Leak vulnerability or weakness.
Products Associated with CVE-2026-12932
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Affected Versions
OpenVPN:- Version 2.5.0, <= 2.6.20 is affected.
- Version 2.7_alpha1, <= 2.7.4 is affected.