What’s Vulnerable › Vulnerabilities

CVE-2026-80735: ovpn: ensure socket is owned by ovpn before deref sk_user_data

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-03 · updated 2026-09-04

Description

In the Linux kernel, the following vulnerability has been resolved: ovpn: ensure socket is owned by ovpn before deref sk_user_data Some subsystems, like BPF SOCKMAP, set sk_user_data without actually setting the encap_type. For this reason, we must make sure that the type is the one ovpn expects before dereferencing sk_user_data. Failing to do so may lead to out-of-bounds reads.

Affected products

• Linux kernel: 6.16 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/43a31142e1d22b3cf5490bd94a94db7196901734
• https://git.kernel.org/stable/c/59aed1eb60d70678a53acccb0cb337a26ce6680e
• https://git.kernel.org/stable/c/61fb3cca40ff938671474f4a16adb908c19032d7

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