Heap-based Buffer Overflow Affecting libxfont package, versions [,2.0.8)
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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- published8 Jul 2026
- disclosed8 Jul 2026
- creditUnknown
Introduced: 8 Jul 2026
CVE-2026-56003 (opens in a new tab)How to fix?
Upgrade libxfont to version 2.0.8 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow via the ComputeScaledProperties process when parsing PCF files without proper size checking of the property buffer. An attacker can achieve arbitrary code execution within the X server by supplying a crafted PCF file as an authenticated X client.