PatchTheCVECVE-2023-28339: OpenDoas through 6.8.2, when TIOCSTI is available, allows privilege escalation because of sharing a terminal w
CVE-2023-28339 is a high-severity flaw (CVSS 8.8) affecting opendoas. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
OpenDoas through 6.8.2, when TIOCSTI is available, allows privilege escalation because of sharing a terminal with the original session. NOTE: TIOCSTI is unavailable in OpenBSD 6.0 and later, and can be made unavailable in the Linux kernel 6.2 and later.
Why this priority
- High severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.6% (top 50%) |
| CISA exploited list | No |
| Weakness | CWE-269 |
| Published | 2023-03-14 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2023-28339?
opendoas: upgrade to newer than 6.8.2. Exact commands for each OS are on this page.
Is CVE-2023-28339 being exploited?
CVE-2023-28339 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2023-28339 affect?
CVE-2023-28339 affects opendoas. Severity is high (CVSS 8.8). OpenDoas through 6.8.2, when TIOCSTI is available, allows privilege escalation because of sharing a terminal with the original session. NOTE: TIOCSTI is unavailable in OpenBSD 6.0 and later, and can be made unavailable in the Linux kernel 6
How urgent is CVE-2023-28339?
Priority 43/100. High severity