Description
An issue was discovered in Linux Containers (LXC) before 2016-02-22. When executing a program via lxc-attach, the nonpriv session can escape to the parent session by using the TIOCSTI ioctl to push characters into the terminal's input buffer, allowing an attacker to escape the container.
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 | lxc | 1:2.0.0-1 | — |
| Debian 13 | lxc | 1:2.0.0-1 | — |
| Debian 12 | lxc | 1:2.0.0-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | lxc | 1.0.10-0ubuntu1.1 | USN-3375-1 |
Advisories 1
- USN-3375-1 lxc vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026