CVE-2025-3908: linux kernel — Fix

Description

The configuration initialization tool in OpenVPN 3 Linux v20 through v24 on Linux allows a local attacker to use symlinks pointing at an arbitrary directory which will change the ownership and permissions of that destination directory.

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CVSS v3.1 Score

6.2

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-59 CWE-59

Affected Products

Vendor	Product	Versions
openvpn	openvpn3linux	20 — 24
linux	linux_kernel	All

References

Advisories & Patches

https://community.openvpn.net/Security%20Announcements/CVE-2025-3908

Other References

http://www.openwall.com/lists/oss-security/2025/05/20/2

Frequently Asked Questions

What is CVE-2025-3908? +

The configuration initialization tool in OpenVPN 3 Linux v20 through v24 on Linux allows a local attacker to use symlinks pointing at an arbitrary directory which will change the ownership and permissions of that destination directory. It has a CVSS v3.1 base score of 6.2 (MEDIUM).

How severe is CVE-2025-3908? +

CVE-2025-3908 has a CVSS v3.1 score of 6.2 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-3908? +

CVE-2025-3908 affects products from linux, openvpn, specifically: linux_kernel, openvpn3linux. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-3908? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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