CVE-2026-84471
The fix for CVE-2026-12996 was incomplete. A use-after-free in OpenVPN 2.6.0 through 2.6.22 and 2...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2026-84471- CVSS 4.0
- 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 - Weakness
- CWE-416
- Updated
- 2026-11-02
EUVDEUVD-2026-101085
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.
- Record
EUVD-2026-101085- CVSS 4.0
- 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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-qpwh-qgw4-8g2c
The fix for CVE-2026-12996 was incomplete. A use-after-free in OpenVPN 2.6.0 through 2.6.22 and 2...
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.
- Record
GHSA-qpwh-qgw4-8g2c- CVSS 4.0
- 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Weakness
- CWE-416
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-84471- CVSS 4.0
- 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Weakness
- CWE-416
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-84471
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.
- Record
DEBIAN-CVE-2026-84471- CVSS 4.0
- 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-84471
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.
- Record
UBUNTU-CVE-2026-84471- CVSS 4.0
- 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 - Updated
- 2026-11-02
OSVMGASA-2026-0498 No score
Updated openvpn package fixes security vulnerabilities
Improve on check_session_buf_not_used(), catch possible double-free in the lame duck case. (CVE-2026-84471) Reliability layer: avoid unbounded reliable TLS timeout, and ignore acks for packets that cannot be outstanding. (CVE-2026-84732)
- Record
MGASA-2026-0498- Updated
- 2026-11-02
OSVUSN-8852-1 No score
openvpn vulnerabilities
It was discovered that OpenVPN had a use-after-free vulnerability in its TLS session handling. An attacker could possibly use this issue to cause OpenVPN to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-84471)
It was discovered that OpenVPN incorrectly handled retransmissions of ACK packet IDs, which could trigger a timeout integer overflow. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-84732)
- Record
USN-8852-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
openvpnDebian:12 |
All versions, plus listed versions 2.6.11-12.6.12-12.6.13-12.6.14-0+deb12u12.6.14-0+deb12u2 Show 40 moreShow less2.6.14-12.6.14-22.6.15-12.6.3-12.6.3-1+deb12u12.6.3-1+deb12u1~bpo11+12.6.3-1+deb12u22.6.3-1+deb12u2~bpo11+12.6.3-1+deb12u32.6.3-1+deb12u42.6.3-22.6.3-2.12.6.7-12.6.9-12.7.0-12.7.0-1~bpo13+12.7.0~alpha1-12.7.0~alpha2-12.7.0~alpha3-12.7.0~beta1-12.7.0~beta2-12.7.0~beta3-12.7.0~rc1-12.7.0~rc2-12.7.0~rc2-22.7.0~rc3-12.7.0~rc4-12.7.0~rc5-12.7.0~rc6-12.7.1-12.7.1-1~bpo13+12.7.2-12.7.2-1~bpo13+12.7.3-12.7.5-12.7.5-1~bpo13+12.7.7-12.7.7-1~bpo13+12.7.8-12.7.8-1~bpo13+1 |
None known |
openvpnDebian:13 |
All versions, plus listed versions 2.6.14-12.6.14-1+deb13u12.6.14-1+deb13u22.6.14-1+deb13u32.6.14-2 Show 27 moreShow less2.6.15-12.7.0-12.7.0-1~bpo13+12.7.0~alpha1-12.7.0~alpha2-12.7.0~alpha3-12.7.0~beta1-12.7.0~beta2-12.7.0~beta3-12.7.0~rc1-12.7.0~rc2-12.7.0~rc2-22.7.0~rc3-12.7.0~rc4-12.7.0~rc5-12.7.0~rc6-12.7.1-12.7.1-1~bpo13+12.7.2-12.7.2-1~bpo13+12.7.3-12.7.5-12.7.5-1~bpo13+12.7.7-12.7.7-1~bpo13+12.7.8-12.7.8-1~bpo13+1 |
None known |
openvpnDebian:14 |
before 2.7.7-1, plus listed versions 2.6.14-12.6.14-22.6.15-12.7.0-12.7.0-1~bpo13+1 Show 21 moreShow less2.7.0~alpha1-12.7.0~alpha2-12.7.0~alpha3-12.7.0~beta1-12.7.0~beta2-12.7.0~beta3-12.7.0~rc1-12.7.0~rc2-12.7.0~rc2-22.7.0~rc3-12.7.0~rc4-12.7.0~rc5-12.7.0~rc6-12.7.1-12.7.1-1~bpo13+12.7.2-12.7.2-1~bpo13+12.7.3-12.7.5-12.7.5-1~bpo13+12.7.7-1~bpo13+1 |
2.7.7-1 |
openvpnMageia:10 From an advisory covering 2 CVEs |
before 2.6.23-1.mga10 | 2.6.23-1.mga10 |
openvpnUbuntu:Pro:14.04:LTS |
All versions, plus listed versions 2.3.2-4ubuntu12.3.2-5ubuntu12.3.2-7ubuntu12.3.2-7ubuntu22.3.2-7ubuntu3 Show 4 moreShow less2.3.2-7ubuntu3.12.3.2-7ubuntu3.22.3.2-7ubuntu3.2+esm12.3.2-7ubuntu3.2+esm2 |
None known |
openvpnUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 2.3.7-1ubuntu12.3.7-2ubuntu12.3.8-1ubuntu12.3.10-1ubuntu12.3.10-1ubuntu2 Show 4 moreShow less2.3.10-1ubuntu2.12.3.10-1ubuntu2.22.3.10-1ubuntu2.2+esm12.3.10-1ubuntu2.2+esm2 |
None known |
openvpnUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 2.4.3-4ubuntu12.4.4-1ubuntu12.4.4-2ubuntu12.4.4-2ubuntu1.12.4.4-2ubuntu1.2 Show 5 moreShow less2.4.4-2ubuntu1.32.4.4-2ubuntu1.52.4.4-2ubuntu1.62.4.4-2ubuntu1.72.4.4-2ubuntu1.7+esm1 |
None known |
openvpnUbuntu:20.04:LTS |
All versions, plus listed versions 2.4.7-1ubuntu22.4.7-1ubuntu2.20.04.22.4.7-1ubuntu2.20.04.32.4.7-1ubuntu2.20.04.42.4.12-0ubuntu0.20.04.12.4.12-0ubuntu0.20.04.2 |
None known |
openvpnUbuntu:22.04:LTS |
before 2.5.11-0ubuntu0.22.04.5, plus listed versions 2.5.1-3ubuntu12.5.1-3ubuntu22.5.1-3ubuntu42.5.1-3ubuntu52.5.5-1ubuntu1 Show 7 moreShow less2.5.5-1ubuntu32.5.5-1ubuntu3.12.5.9-0ubuntu0.22.04.22.5.9-0ubuntu0.22.04.32.5.11-0ubuntu0.22.04.12.5.11-0ubuntu0.22.04.32.5.11-0ubuntu0.22.04.4 |
2.5.11-0ubuntu0.22.04.5 |
openvpnUbuntu:24.04:LTS |
before 2.6.19-0ubuntu0.24.04.4, plus listed versions 2.6.5-0ubuntu12.6.7-1ubuntu12.6.9-1ubuntu22.6.9-1ubuntu32.6.9-1ubuntu4 Show 9 moreShow less2.6.9-1ubuntu4.12.6.12-0ubuntu0.24.04.12.6.12-0ubuntu0.24.04.32.6.14-0ubuntu0.24.04.12.6.14-0ubuntu0.24.04.22.6.14-0ubuntu0.24.04.32.6.19-0ubuntu0.24.04.12.6.19-0ubuntu0.24.04.22.6.19-0ubuntu0.24.04.3 |
2.6.19-0ubuntu0.24.04.4 |
Show 4 moreShow less
| Package | Affected | Fixed |
|---|---|---|
openvpnUbuntu:26.04:LTS |
before 2.7.0-1ubuntu1.3, plus listed versions 2.6.14-2ubuntu12.6.15-1ubuntu12.7.0~rc5-1ubuntu52.7.0~rc6-1ubuntu12.7.0-1ubuntu12.7.0-1ubuntu1.12.7.0-1ubuntu1.2 |
2.7.0-1ubuntu1.3 |
openvpnUbuntu:22.04:LTS From an advisory covering 2 CVEs |
before 2.5.11-0ubuntu0.22.04.5, plus listed versions 2.5.1-3ubuntu12.5.1-3ubuntu22.5.1-3ubuntu42.5.1-3ubuntu52.5.5-1ubuntu1 Show 7 moreShow less2.5.5-1ubuntu32.5.5-1ubuntu3.12.5.9-0ubuntu0.22.04.22.5.9-0ubuntu0.22.04.32.5.11-0ubuntu0.22.04.12.5.11-0ubuntu0.22.04.32.5.11-0ubuntu0.22.04.4 |
2.5.11-0ubuntu0.22.04.5 |
openvpnUbuntu:24.04:LTS From an advisory covering 2 CVEs |
before 2.6.19-0ubuntu0.24.04.4, plus listed versions 2.6.5-0ubuntu12.6.7-1ubuntu12.6.9-1ubuntu22.6.9-1ubuntu32.6.9-1ubuntu4 Show 9 moreShow less2.6.9-1ubuntu4.12.6.12-0ubuntu0.24.04.12.6.12-0ubuntu0.24.04.32.6.14-0ubuntu0.24.04.12.6.14-0ubuntu0.24.04.22.6.14-0ubuntu0.24.04.32.6.19-0ubuntu0.24.04.12.6.19-0ubuntu0.24.04.22.6.19-0ubuntu0.24.04.3 |
2.6.19-0ubuntu0.24.04.4 |
openvpnUbuntu:26.04:LTS From an advisory covering 2 CVEs |
before 2.7.0-1ubuntu1.3, plus listed versions 2.6.14-2ubuntu12.6.15-1ubuntu12.7.0~rc5-1ubuntu52.7.0~rc6-1ubuntu12.7.0-1ubuntu12.7.0-1ubuntu1.12.7.0-1ubuntu1.2 |
2.7.0-1ubuntu1.3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-84471 is a high vulnerability (CVSS 7.2) in Openvpn, published September 4, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. Fixed in openvpn 2.7.7-1.