CVE-2026-34085
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
2th
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.
| CWE | CWE-193 |
| Vendor | fontconfig project |
| Product | fontconfig |
| Published | Mar 25, 2026 |
| Last Updated | Apr 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Affected Versions
fontconfig project / fontconfig
0 < 2.17.1
References
gitlab.freedesktop.org: https://gitlab.freedesktop.org/fontconfig/fontconfig/-/commit/b9bec06d73340f1b5727302d13ac3df307b7febc gitlab.freedesktop.org: https://gitlab.freedesktop.org/fontconfig/fontconfig/-/merge_requests/446 gitlab.freedesktop.org: https://gitlab.freedesktop.org/fontconfig/fontconfig/-/work_items/481