Description
chroot in GNU coreutils, when used with --userspec, allows local users to escape to the parent session via a crafted TIOCSTI ioctl call, which pushes characters to the terminal's input buffer.
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 | coreutils | 9.4-1 | — |
| Debian 13 | coreutils | 9.4-1 | — |
| Debian 12 | coreutils | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | coreutils | No fix yet | — |
| Ubuntu 24.04 LTS | coreutils | No fix yet | — |
| Ubuntu 22.04 LTS | coreutils | No fix yet | — |
| Ubuntu 20.04 LTS | coreutils | No fix yet | — |
| Ubuntu 18.04 LTS | coreutils | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | coreutils | No fix yet | — |
| Ubuntu 14.04 LTS | coreutils | No fix yet | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | coreutils | 9.4-1 | — |
| Azure Linux 2 (CBL-Mariner) | coreutils | 8.32-1 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | coreutils | 9.6-r30 | — |
References
- [oss-security] 20160228 Re: Re: CVE Request: util-linux runuser tty hijacking via TIOCSTI ioctl mailing-list
- [oss-security] 20160228 Re: CVE Request: util-linux runuser tty hijacking via TIOCSTI ioctl -- chroot mailing-list
- [mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar mailing-list