Out-of-bounds Write The advisory has been revoked - it doesn't affect any version of package libXfont2 (opens in a new tab)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-LIBXFONT2-18381924
- published29 Jul 2026
- disclosed8 Jul 2026
Introduced: 8 Jul 2026
CVE-2026-56003 (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 libXfont2 package and not the libXfont2 package as distributed by RHEL.
A heap buffer overflow due to missing size checking in the property buffer when parsing PCF files in libXfont2 ComputeScaledProperties() before libXfont2 before 2.0.8 could be used by attackers using authenticated X clients to execute code within the X server.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2496642
- https://access.redhat.com/security/cve/CVE-2026-56003
- https://access.redhat.com/errata/RHSA-2026:47079
- https://access.redhat.com/errata/RHSA-2026:51061
- https://gitlab.freedesktop.org/xorg/lib/libxfont/-/commit/dff957a5158da038a282a59a31fe736702732939
- https://www.openwall.com/lists/oss-security/2026/07/08/1