CVE-2026-56003

HighCVSS 8.8/10Last modified Oct 25, 2026

Description

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.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-122

Affected software

Vendor	Product	Versions
X.Org	libXfont2	< 2.0.8

References

https://gitlab.freedesktop.org/xorg/lib/libxfont/-/commit/dff957a5158da038a282a59a31fe736702732939Patch
https://www.openwall.com/lists/oss-security/2026/07/08/1Mailing List, Patch, Third Party Advisory

Timeline

Published: Jul 8, 2026
Last modified: Oct 25, 2026
NVD status: Analyzed

Related CVEs from 2026

CVE-2026-5600410.0A shellcode injection in the mercurial handler of the obs tar_scm source service before version 0.12.4 could be used by attackers able to pr CVE-2026-560057.1Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Melapress WP Activity Log wp-security-CVE-2026-560067.1Unauthenticated Cross Site Scripting (XSS) in H5P <= 1.17.6 versions.CVE-2026-560075.9Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in OceanWP Ocean Product Sharing allows S CVE-2026-560088.8Contributor Privilege Escalation in Fusion Builder <= 3.15.4 versions.CVE-2026-560095.9Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Bricksable for Bricks Builder allows S CVE-2026-56015.3A vulnerability was found in Acrel Electrical Prepaid Cloud Platform 1.0. This issue affects some unknown processing of the file /bin.rar of CVE-2026-560108.8Subscriber Privilege Escalation in Abandoned Cart Pro for WooCommerce <= 10.4.0 versions.CVE-2026-560117.1Unauthenticated Cross Site Scripting (XSS) in MapPress Maps for WordPress <= 2.97.3 versions.CVE-2026-560128.5Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in David Lingren Media LIbrary Assistant CVE-2026-560136.5Unauthenticated Insecure Direct Object References (IDOR) in License Manager for WooCommerce <= 3.0.15 versions.CVE-2026-560147.1Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Averta Master Slider master-slider all