Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | opendoas | No fix yet | — |
| Debian 12 | opendoas | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | opendoas | No fix yet | — |
| Ubuntu 26.04 LTS | opendoas | No fix yet | — |
| Ubuntu 25.10 | opendoas | No fix yet | — |
| Ubuntu 24.04 LTS | opendoas | No fix yet | — |
| Ubuntu 22.04 LTS | doas | No fix yet | — |