CVE-2026-12996: Use After Free

Published Jul 30, 2026
·
Updated

A use-after-free in OpenVPN 2.6.0 through 2.6.20 and 2.7alpha1 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 Software

4 affected componentsFixes available
debian/openvpn<=2.5.1-3, <=2.5.1-3+deb11u4
2.6.14-0+deb12u22.6.14-1+deb13u32.7.5-1
OpenVPN OpenVPN>=2.6.0<2.6.21
OpenVPN OpenVPN>=2.7<2.7.5
Debian Debian Linux=11.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/openvpn to a version that resolves this vulnerability.

    Fixed in 2.6.14-0+deb12u2Fixed in 2.6.14-1+deb13u3Fixed in 2.7.5-1
  2. Upgrade

    Upgrade OpenVPN to a version that resolves this vulnerability.

    Fixed in 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4

Event History

Jul 15, 2026
Data Sourced
via Ubuntu·05:31 PM
RemedyDescriptionSeverityAffected Software
Data Sourced
via Debian·05:32 PM
DescriptionAffected Software
Jul 30, 2026
CVE Published
via MITRE·04:38 PM
Data Sourced
via MITRE·04:38 PM
DescriptionWeakness
Data Sourced
via NVD·05:16 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-12996?

CVE-2026-12996 has a risk rating of 33, indicating a moderate level of severity.

2

How do I fix CVE-2026-12996?

To mitigate CVE-2026-12996, upgrade OpenVPN to version 2.6.21 or later or apply any available patches.

3

What versions of OpenVPN are affected by CVE-2026-12996?

CVE-2026-12996 affects OpenVPN versions 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4.

4

What is the impact of CVE-2026-12996?

CVE-2026-12996 allows remote authenticated peers to cause denial of service or potentially leak memory.

5

Is CVE-2026-12996 a Use After Free vulnerability?

Yes, CVE-2026-12996 is categorized as a Use After Free vulnerability.

Company

Resources

Contact

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