Off-by-one Error The advisory has been revoked - it doesn't affect any version of package fontconfig-devel (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-FONTCONFIGDEVEL-15809079
- published29 Mar 2026
- disclosed25 Mar 2026
Introduced: 25 Mar 2026
CVE-2026-34085 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream fontconfig-devel package and not the fontconfig-devel package as distributed by RHEL.
fontconfig before 2.17.1 has an off-by-one error in allocation during sfnt capability handling, leading to a one-byte out-of-bounds write, and potentially a crash or code execution. This is in FcFontCapabilities in fcfreetype.c.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2451414
- https://access.redhat.com/security/cve/CVE-2026-34085
- https://access.redhat.com/errata/RHSA-2026:13722
- https://gitlab.freedesktop.org/fontconfig/fontconfig/-/commit/b9bec06d73340f1b5727302d13ac3df307b7febc
- https://gitlab.freedesktop.org/fontconfig/fontconfig/-/merge_requests/446
- https://gitlab.freedesktop.org/fontconfig/fontconfig/-/work_items/481