Off-by-one Error Affecting fontconfig package, versions [,2.17.1)
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-CONAN-FONTCONFIG-15850774
- published31 Mar 2026
- disclosed25 Mar 2026
- creditUnknown
Introduced: 25 Mar 2026
NewCVE-2026-34085 (opens in a new tab)How to fix?
Upgrade fontconfig to version 2.17.1 or higher.
Overview
Affected versions of this package are vulnerable to Off-by-one Error via the FcFontCapabilities function in fcfreetype.c. An attacker can cause a one-byte out-of-bounds write, potentially leading to a crash or execution of arbitrary code by supplying crafted input that triggers the off-by-one error during sfnt capability handling.