High severity8.1NVD Advisory· Published Jul 30, 2026· Updated Aug 5, 2026

CVE-2026-12996

Description

A use-after-free in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry

Affected products

OpenVPN/OpenVPN2 versions
cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:*range: >=2.6.0,<2.6.21
- (no CPE)range: 2.6.0-2.6.20, 2.7.0-2.7.4
Debian/linux
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

Patches

Vulnerability mechanics

References

community.openvpn.net/Security%20Announcements/CVE-2026-12996nvdVendor Advisory
lists.debian.org/debian-lts-announce/2026/07/msg00013.htmlnvdMailing ListThird Party Advisory
community.openvpn.net/ReleaseHistorynvdRelease Notes
community.openvpn.net/ReleaseHistorynvdRelease Notes

News mentions

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cvss	0.526
epss	0.000
exploit	0.000
kev	0.000
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ransomware	0.000