Description
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.
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 | fontconfig | 2.11.0-6.5 | — |
| Debian 13 | fontconfig | 2.11.0-6.5 | — |
| Debian 12 | fontconfig | 2.11.0-6.5 | — |
| Debian 8 | fontconfig | 2.11.0-6.3+deb8u1 | DSA-3644-1 |
| Debian 7 | fontconfig | 2.9.0-7.1+deb7u1 | DLA-587-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | fontconfig | 2.11.94-0ubuntu1.1 | USN-3063-1 |
| Ubuntu 14.04 LTS | fontconfig | 2.11.0-0ubuntu4.2 | USN-3063-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | fontconfig +2 | 2.10.95-10.el7 | RHSA-2016:2601 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | fontconfig | 2.11.0-6.1 | SUSE-SU-2016:2190-1 |
| SLES 11 SP4 | fontconfig | 2.6.0-10.19.1 | SUSE-SU-2016:2186-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | fontconfig | 2.11.0-6.1 | SUSE-SU-2016:2190-1 |
| SLES for SAP 11 SP4 | fontconfig | 2.6.0-10.19.1 | SUSE-SU-2016:2186-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | fontconfig +2 | 2.10.95-10.el7 | ELSA-2016-2601 |
Advisories 7
- RHSA-2016:2601 Red Hat Security Advisory: fontconfig security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-3063-1 fontconfig vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-587-1 fontconfig - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3644-1 fontconfig - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:2186-1 Security update for fontconfig SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2190-1 Security update for fontconfig SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2016-2601 Moderate: fontconfig security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 9, 2016
References
- FEDORA-2016-e23ab56ce3 vendor-advisory
- USN-3063-1 vendor-advisory
- [Fontconfig] 20160805 fontconfig: Branch 'master' - 3 commits mailing-list
- RHSA-2016:2601 vendor-advisory
- https://cgit.freedesktop.org/fontconfig/commit/?id=7a4a5bd7897d216f0794ca9dbce0a4a5c9d14940
- 92339 vdb-entry
- DSA-3644 vendor-advisory
- FEDORA-2016-6802f2e52a vendor-advisory