CVE-2024-1305: tap-windows6 Integer Overflow — Fix

Description

tap-windows6 driver version 9.26 and earlier does not properly check the size data of incomming write operations which an attacker can use to overflow memory buffers, resulting in a bug check and potentially arbitrary code execution in kernel space

Is your site exposed to CVE-2024-1305?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

9.8

CRITICAL

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

Weakness Type (CWE)

CWE-190 Integer Overflow

Affected Products

Vendor	Product	Versions
openvpn	tap-windows6	< 9.26.0

References

Advisories & Patches

https://community.openvpn.net/openvpn/wiki/CVE-2024-1305 https://community.openvpn.net/openvpn/wiki/CVE-2024-1305

Other References

https://www.mail-archive.com/[email protected]/msg07534.html https://www.mail-archive.com/[email protected]/msg07534.html

Frequently Asked Questions

What is CVE-2024-1305? +

tap-windows6 driver version 9.26 and earlier does not properly check the size data of incomming write operations which an attacker can use to overflow memory buffers, resulting in a bug check and potentially arbitrary code execution in kernel space It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2024-1305? +

CVE-2024-1305 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2024-1305? +

CVE-2024-1305 affects products from openvpn, specifically: tap-windows6. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-1305? +

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.

Related Vulnerabilities

CVE-2025-2574

Out-of-bounds array write in Xpdf 4.05 and earlier, due to incorrect integer overflow checking in the PostScript function interpreter code.

CVE-2025-46333

z2d is a pure Zig 2D graphics library. Versions of z2d after `0.5.1` and up to and including `0.6.0`, when …

CVE-2024-30212

If a SCSI READ(10) command is initiated via USB using the largest LBA (0xFFFFFFFF) with it's default block size of …

CVE-2025-52935

Integer Overflow or Wraparound vulnerability in dragonflydb dragonfly (src/redis/lua/struct modules). This vulnerability is associated with program files lua_struct.C. This issue …

CVE-2025-7709

An integer overflow exists in the FTS5 https://sqlite.org/fts5.html extension. It occurs when the size of an array of tombstone pointers …

CVE-2026-57156

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0 on 32-bit builds, FreeRDP clients contain an …

CVE-2024-1305