Description
In Firejail before 0.9.60, seccomp filters are writable inside the jail, leading to a lack of intended seccomp restrictions for a process that is joined to the jail after a filter has been modified by an attacker.
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 | firejail | 0.9.58.2-2 | — |
| Debian 13 | firejail | 0.9.58.2-2 | — |
| Debian 12 | firejail | 0.9.58.2-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | firejail | No fix yet | — |
| Ubuntu 16.04 LTS | firejail | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | firejail | 0.9.66-1.2 | openSUSE-SU-2024:10759-1 |
Advisories 1
- openSUSE-SU-2024:10759-1 firejail-0.9.66-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026