CVE-2023-46849
Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows...
Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.
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
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
7.5
Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.
- Record
CVE-2023-46849- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-369
- Updated
- 2026-11-02
CVE List
7.5
Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.
- Record
CVE-2023-46849- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-369
- Updated
- 2026-11-02
EUVDEUVD-2023-51015
7.5
Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.
- Record
EUVD-2023-51015- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-p99v-qjfm-8vvq
7.5
Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows...
Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.
- Record
GHSA-p99v-qjfm-8vvq- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-369
- Updated
- 2026-11-02
OSVALPINE-CVE-2023-46849
7.5
Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.
- Record
ALPINE-CVE-2023-46849- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSV
7.5
Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.
- Record
CVE-2023-46849- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-369
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2023-46849
7.5
Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.
- Record
DEBIAN-CVE-2023-46849- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2023-46849
7.5
Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.
- Record
UBUNTU-CVE-2023-46849- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - 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
| Package | Affected | Fixed |
|---|---|---|
openvpnAlpine:v3.18 |
2.6.0 up to 2.6.7-r0 | 2.6.7-r0 |
openvpnAlpine:v3.19 |
2.6.0 up to 2.6.7-r0 | 2.6.7-r0 |
openvpnAlpine:v3.20 |
2.6.0 up to 2.6.7-r0 | 2.6.7-r0 |
openvpnAlpine:v3.21 |
2.6.0 up to 2.6.7-r0 | 2.6.7-r0 |
openvpnAlpine:v3.22 |
2.6.0 up to 2.6.7-r0 | 2.6.7-r0 |
openvpnAlpine:v3.23 |
2.6.0 up to 2.6.7-r0 | 2.6.7-r0 |
openvpnAlpine:v3.24 |
2.6.0 up to 2.6.7-r0 | 2.6.7-r0 |
openvpnDebian: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 |
openvpnDebian:13 |
before 2.6.7-1 | 2.6.7-1 |
openvpnDebian:14 |
before 2.6.7-1 | 2.6.7-1 |
openvpnDebian: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 |
openvpnopenSUSE:Tumbleweed From an advisory covering 2 CVEs |
before 2.6.7-1.1 | 2.6.7-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-46849 is a high vulnerability (CVSS 7.5) in Openvpn, published November 11, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.14%, the 66th percentile. Fixed in openvpn 2.6.7-r0.
References
community.openvpn.net/openvpn/wiki/CVE-2023-46849
openvpn.net/security-advisory/access-server-security-update-cve-2023-46849-cve-2023-46850
debian.org/security/2023/dsa-5555
lists.fedoraproject.org/archives/list/[email protected]/message/L3FS46ANNTAVLIQY56ZKGM5CBTRVBUNE
lists.fedoraproject.org/archives/list/[email protected]/message/O54I7D753V6PU6XBU26FEROD2DSHEJQ4
nvd.nist.gov/vuln/detail/CVE-2023-46849
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github.com/advisories/GHSA-p99v-qjfm-8vvq
security.alpinelinux.org/vuln/CVE-2023-46849
github.com/CVEProject/cvelistV5/tree/main/cves/2023/46xxx/CVE-2023-46849.json
security-tracker.debian.org/tracker/CVE-2023-46849
ubuntu.com/security/CVE-2023-46849
ubuntu.com/security/notices/USN-6484-1
cve.org/CVERecord?id=CVE-2023-46849
suse.com/security/cve/CVE-2023-46849
suse.com/security/cve/CVE-2023-46850