CVE-2026-84732
Publication date 7 September 2026
Last updated 30 September 2026
Ubuntu priority
Description
Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that trigger a timeout integer overflow
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| openvpn | 26.04 LTS resolute |
Fixed 2.7.0-1ubuntu1.3
|
| 24.04 LTS noble |
Fixed 2.6.19-0ubuntu0.24.04.4
|
|
| 22.04 LTS jammy |
Fixed 2.5.11-0ubuntu0.22.04.5
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| 14.04 LTS trusty |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v4.0
Base score
8.7 · High
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L
References
Related Ubuntu Security Notices (USN)
- USN-8852-1
- OpenVPN vulnerabilities
- 30 September 2026