CVE-2026-84471 Use after free in OpenVPN
Remote authenticated peers can cause denial of service or leak memory via crafted packets due to an incomplete fix for a previous use-after-free vulnerability.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-84471?
CVE-2026-84471 is a high-severity use after free vulnerability in OpenVPN, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The fix for CVE-2026-12996 was incomplete. A use-after-free in OpenVPN 2.6.0 through 2.6.22 and 2.7_alpha1 through 2.7.7 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry.
Weakness: CWE-416
Which versions are affected by CVE-2026-84471?
How do I fix CVE-2026-84471?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-84471 being exploited?
There is no known exploitation of CVE-2026-84471 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-84471, GHSA-qpwh-qgw4-8g2c, UBUNTU-CVE-2026-84471.