Heap-based Buffer Overflow Affecting libXfont2 package, versions <0:2.0.3-12.el9_8.1


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.43% (36th percentile)

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  • Snyk IDSNYK-ORACLE9-LIBXFONT2-18391963
  • published29 Jul 2026
  • disclosed8 Jul 2026

Introduced: 8 Jul 2026

NewCVE-2026-56002  (opens in a new tab)
CWE-122  (opens in a new tab)

How to fix?

Upgrade Oracle:9 libXfont2 to version 0:2.0.3-12.el9_8.1 or higher.
This issue was patched in ELSA-2026-47084.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libXfont2 package and not the libXfont2 package as distributed by Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

A heap bufferflow in pcfReadFont() due to missing glyph bounds checking in libXfont2 before 2.0.8  allows attackers authenticated as X client to execute code within the X server.

CVSS Base Scores

version 3.1