CVE-2026-88964

Integer Underflow in OpenVPN Causing DoS and Memory Disclosure via Domain Search Options

Published Oct 13, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Description
An integer underflow in OpenVPN version 2.7_alpha3 through 2.7.7 on Windows and Android allows remote authenticated servers to cause a denial of service or memory disclosure via crafted domain search options

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Openvpn
Openvpn openvpn
Vendors & Products Openvpn
Openvpn openvpn
Type Values Removed Values Added
Title Integer Underflow in OpenVPN Causing DoS and Memory Disclosure via Domain Search Options
Type Values Removed Values Added
Title Integer Underflow in OpenVPN Domain Search Parsing Causes Denial of Service and Memory Disclosure
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Integer Underflow in OpenVPN Domain Search Parsing Causes Denial of Service and Memory Disclosure
Type Values Removed Values Added
Description An integer underflow in OpenVPN version 2.7_alpha3 through 2.7.7 on Windows and Android allows remote authenticated servers to cause a denial of service or memory disclosure via crafted domain search options
Weaknesses CWE-125
CWE-191
References
Metrics cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
OpenVPN
Published
Updated
Oct 14, 2026, 6:09 PM
Reserved
Sep 10, 2026, 3:53 PM
Status
Awaiting Analysis
Published
Oct 13, 2026, 11:19 PM
Modified
Oct 15, 2026, 8:38 PM