High [CVE-2026-12932] Denial of Service due to memory leak in tls-crypt-v2 client key extraction
This high-severity Red Hat Linux advisory covers CVE-2026-12932.
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Summary
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 A flaw was found in OpenVPN.
By sending a flood of specially crafted packets, an attacker can exhaust the system's memory, making the service unavailable. This vulnerability is rated as Important.
A memory leak within the tls-crypt-v2 client key extraction mechanism of OpenVPN can be remotely triggered by an unauthenticated attacker. This impact is significant due to the remote, unauthenticated nature of the attack.
Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-771.
- 2.5.0
- 2.6.20
- 2.7.4
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
Mitigation
The source record does not include mitigation steps. That does not mean no fix exists. Read the vendor advisory below for the authoritative guidance.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
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