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Vulnerability record · CVE-2024-1305 · published 8 July 2024

CVE-2024-1305: Openvpn tap-windows6 integer overflow vulnerability

Openvpn · Tap Windows6

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

9.8 CVSS 3.1 Critical EPSS 15% · top 3.3% CWE-190 · Integer overflow
9.8CVSS 3.1 base score
15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://community.openvpn.net/openvpn/wiki/CVE-2024-1305 Vendor Advisory
https://www.mail-archive.com/[email protected]/msg07534.html Mailing ListRelease Notes
https://community.openvpn.net/openvpn/wiki/CVE-2024-1305 Vendor Advisory
https://www.mail-archive.com/[email protected]/msg07534.html Mailing ListRelease Notes

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2024-1305), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.