# CVE-2026-13698 - Server memory leak via repeated tls-crypt-v2 HARD_RESET_CLIENT_V3 packets
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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-crypt-v2 client key to potentially cause a denial of service
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A memory leak in the `tls_crypt_v2_extract_client_key` function in OpenVPN 2.x allows remote attackers with a valid
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tls-crypt-v2 client key to cause a denial of service (memory exhaustion) via repeated `HARD_RESET_CLIENT_V3` packets
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when `tls-crypt-v2` is enabled because the server fails to free existing key contexts before overwriting them during
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session re-initialisation.
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OpenVPN version 2.5.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 are affected. This is fixed in versions 2.6.21 and 2.7.5.
