CVE-2026-80735
ovpn: ensure socket is owned by ovpn before deref sk_user_data
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.
INFO
Published Date :
Sept. 3, 2026, 8:21 a.m.
Last Modified :
Sept. 3, 2026, 8:21 a.m.
Remotely Exploit :
No
Source :
Linux
Solution
- Update the Linux kernel to the latest stable version.
- Apply the specific patch for the ovpn subsystem.
- Verify socket ownership before accessing sk_user_data.
- Ensure encap_type is set correctly.
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