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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.

PUBLISHED Reserved 2026-06-18 | Published 2026-07-08 | Updated 2026-07-09 | Assigner suse




HIGH: 8.5CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Problem types

CWE-122 Heap-based buffer overflow

Product status

Default status
unaffected

Any version before 2.0.8
affected

Credits

Anonymous working with Trend Micro Zero Day Initiative finder

References

www.openwall.com/lists/oss-security/2026/07/08/1 vendor-advisory

gitlab.freedesktop.org/...a5158da038a282a59a31fe736702732939 patch

cve.org (CVE-2026-56003)

nvd.nist.gov (CVE-2026-56003)

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