CVE-2026-84732 Integer overflow in OpenVPN
Remote unauthenticated attackers can cause denial of service in OpenVPN by triggering an integer overflow via crafted ACK packet retransmissions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-84732?
CVE-2026-84732 is a high-severity vulnerability in OpenVPN, published on 7 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that trigger a timeout integer overflow
Weakness: CWE-190
Which versions are affected by CVE-2026-84732?
Linux distribution packages (2)
openvpn SUSE:Linux Enterprise Server 12 SP5-LTSS | All versions | 2.3.8-16.38.1 |
openvpn SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 2.3.8-16.38.1 |
How do I fix CVE-2026-84732?
Apply the vendor's patch.
Is CVE-2026-84732 being exploited?
There is no known exploitation of CVE-2026-84732 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2026-84732, CLSA-2026-1792649282, DEBIAN-CVE-2026-84732, GHSA-6r5j-cp22-59fv, OESA-2026-4095, OESA-2026-4096 and 3 more.