Medium [CVE-2026-13117] Denial of service or memory leakage via incomplete TLS guard
This medium-severity Red Hat Linux advisory covers CVE-2026-13117.
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Summary
An incomplete guard in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote authenticated peers to trigger a use-after-free during TLS session promotion, potentially leading to a denial of service or memory leakage A flaw was found in OpenVPN.
This can lead to a denial of service, making the service unavailable, or memory leakage, which could potentially expose sensitive information. The high attack complexity and requirement for prior authentication limit the immediate risk, but successful exploitation could disrupt VPN services or expose sensitive information.
Red Hat severity: Moderate — CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H). Weakness: CWE-825.
- 2.6.0
- 2.6.20
- 2.7.4
Official advisory · high-confidence parse· fetched 9 days 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 9 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · high-confidence parse· fetched 9 days ago·verify at source
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