Description
colmux in collectl before 4.3.20.2 does not sanitize ANSI/VT100 terminal escape sequences in data received from remote collectl instances before displaying it, allowing a local user on a monitored host to inject escape sequences into the terminal of an operator running colmux, via a crafted process name (argv[0]).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | collectl | < 4.3.20.3 | 4.3.20.3 |
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 | collectl | No fix yet | — |
| Debian 13 | collectl | No fix yet | — |
| Debian 12 | collectl | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | collectl | No fix yet | — |
| Ubuntu 26.04 LTS | collectl | No fix yet | — |
| Ubuntu 24.04 LTS | collectl | No fix yet | — |
| Ubuntu 22.04 LTS | collectl | No fix yet | — |
| Ubuntu 20.04 LTS | collectl | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | collectl | No fix yet | — |
| Ubuntu 16.04 LTS | collectl | No fix yet | — |
| Ubuntu 14.04 LTS | collectl | No fix yet | — |
References
- https://access.redhat.com/security/cve/CVE-2026-103431 vdb-entry
- RHBZ#2543974 issue-tracking