Description
An integer underflow in OpenVPN version 2.7_alpha3 through 2.7.7 on Windows and Android allows remote authenticated servers to cause a denial of service or memory disclosure via crafted domain search options
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenVPN | OpenVPN | 2.7_alpha3 – ≤ 2.7.7 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openvpn | 2.7.8-1 | — |
| Debian 13 | openvpn | No fix yet | — |
| Debian 12 | openvpn | No fix yet | — |
Advisories 1
- WID-SEC-2026-3915 OpenVPN: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026