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CVE-2023-46850

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory...

9.8 CriticalFix available

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

2.00%Up 1.9 points since Nov 11, 2023
90%50%10%1%

What each source reports

NVD Score used 9.8

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.

Record
CVE-2023-46850
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-416
Updated
2026-11-02
CVE List No score

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.

Record
CVE-2023-46850
Weakness
CWE-416
Updated
2026-11-02
EUVDEUVD-2023-51016 No score

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.

Record
EUVD-2023-51016
Updated
2026-11-02
GitHub AdvisoriesGHSA-jg57-vh55-3g23 9.8

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory...

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.

Record
GHSA-jg57-vh55-3g23
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-416
Updated
2026-11-02
OSVALPINE-CVE-2023-46850 9.8

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.

Record
ALPINE-CVE-2023-46850
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2023-46850 9.8

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.

Record
DEBIAN-CVE-2023-46850
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2023-46850 9.8

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.

Record
UBUNTU-CVE-2023-46850
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSV No score

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.

Record
CVE-2023-46850
Weakness
CWE-416
Updated
2026-11-02
OSVopenSUSE-SU-2024:13429-1 No score

openvpn-2.6.7-1.1 on GA media

These are all security issues fixed in the openvpn-2.6.7-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:13429-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
openvpn
Alpine:v3.18
 2.6.0 up to 2.6.7-r0
2.6.7-r0
openvpn
Alpine:v3.19
 2.6.0 up to 2.6.7-r0
2.6.7-r0
openvpn
Alpine:v3.20
 2.6.0 up to 2.6.7-r0
2.6.7-r0
openvpn
Alpine:v3.21
 2.6.0 up to 2.6.7-r0
2.6.7-r0
openvpn
Alpine:v3.22
 2.6.0 up to 2.6.7-r0
2.6.7-r0
openvpn
Alpine:v3.23
 2.6.0 up to 2.6.7-r0
2.6.7-r0
openvpn
Alpine:v3.24
 2.6.0 up to 2.6.7-r0
2.6.7-r0
openvpn
Debian:12
 before 2.6.3-1+deb12u2, plus listed versions
2.6.3-12.6.3-1+deb12u12.6.3-1+deb12u1~bpo11+12.6.3-1+deb12u2~bpo11+1
2.6.3-1+deb12u2
openvpn
Debian:13
 before 2.6.7-1
2.6.7-1
openvpn
Debian:14
 before 2.6.7-1
2.6.7-1
openvpn
Debian:12
From an advisory covering 2 CVEs
 before 2.6.3-1+deb12u2, plus listed versions
2.6.3-12.6.3-1+deb12u12.6.3-1+deb12u1~bpo11+12.6.3-1+deb12u2~bpo11+1
2.6.3-1+deb12u2
openvpn
openSUSE:Tumbleweed
From an advisory covering 2 CVEs
 before 2.6.7-1.1
2.6.7-1.1

History

History
RecordedChangedSources
affected, facts
affected
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-46850 is a critical vulnerability (CVSS 9.8) in Openvpn, published November 11, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.00%, the 80th percentile. Fixed in openvpn 2.6.7-r0.

References

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