CVE-2026-84471 | BDVDB-2026-388985 Detail

OpenVPNOpenVPN

Description#

The fix for CVE-2026-12996 was incomplete. A use-after-free in OpenVPN 2.6.0 through 2.6.22 and 2.7_alpha1 through 2.7.7 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry.

Impact#

Per CVSS v4.0: confidentiality impact low, integrity impact low, availability impact high. Attack vector: network.

Weaknesses#

CWE-416 Use After Free

References#

https://community.openvpn.net/Security%20Announcements/CVE-2026-84471

Exploit#

No public exploit known

History#

Version 12026-10-14Record published in the CVE List.
Version 22026-10-16Most recent update recorded in the CVE List.

Published

Published: 2026-10-14
Last modified: 2026-10-16

Vendor information

Vendor: OpenVPN
Product: OpenVPN

All OpenVPN vulnerabilities

Score

7.2 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 35.3.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 2.6.0 and <= 2.6.22
Fixed
Not stated
Vulnerable
>= 2.7_alpha1 and <= 2.7.7
Fixed
Not stated

Scoring System

CVSS v4.0

7.2 High

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Attack Requirements	None
Privileges Required	Low
User Interaction	None
Vulnerable System Confidentiality	Low
Vulnerable System Integrity	Low
Vulnerable System Availability	High
Subsequent System Confidentiality	None
Subsequent System Integrity	None
Subsequent System Availability	None

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).