fontconfig before 2.12.1 does not validate offsets, which allows local users to trigger arbitrary free calls and consequently conduct double free attacks and execute arbitrary code via a crafted cache file.
| Software | From | Fixed in |
|---|---|---|
| fedoraproject / fedora | 24 | 24.x |
| fedoraproject / fedora | 23 | 23.x |
| fontconfig_project / fontconfig | - | 2.12.1 |
| debian / debian_linux | 8.0 | 8.0.x |
| canonical / ubuntu_linux | 14.04 | 14.04.x |
| canonical / ubuntu_linux | 16.04 | 16.04.x |
| canonical / ubuntu_linux | 12.04 | 12.04.x |