ALAS2023-2026-1967

Amazon Linux 2023 Security Advisory: ALAS2023-2026-1967
Advisory Released Date: 2026-07-20
Advisory Updated Date: 2026-07-20
Severity: Important
Issue Overview:

BitmapScaleBitmaps Integer Overflow Heap Buffer Overflow (CVE-2026-56001)

PCF Font Parsing Heap Buffer Overflow (CVE-2026-56002)

computeProps Property Buffer Heap Buffer Overflow (CVE-2026-56003)


Affected Packages:

libXfont2


Issue Correction:
Run dnf update libXfont2 --releasever 2023.12.20260720 or dnf update --advisory ALAS2023-2026-1967 --releasever 2023.12.20260720 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation

New Packages:
aarch64:
    libXfont2-debugsource-2.0.7-1.amzn2023.0.2.aarch64
    libXfont2-debuginfo-2.0.7-1.amzn2023.0.2.aarch64
    libXfont2-devel-2.0.7-1.amzn2023.0.2.aarch64
    libXfont2-2.0.7-1.amzn2023.0.2.aarch64

src:
    libXfont2-2.0.7-1.amzn2023.0.2.src

x86_64:
    libXfont2-debuginfo-2.0.7-1.amzn2023.0.2.x86_64
    libXfont2-debugsource-2.0.7-1.amzn2023.0.2.x86_64
    libXfont2-devel-2.0.7-1.amzn2023.0.2.x86_64
    libXfont2-2.0.7-1.amzn2023.0.2.x86_64

Additional References

Release Notes:  Amazon Linux 2023 Release Notes

Red Hat: CVE-2026-56001, CVE-2026-56002, CVE-2026-56003

Mitre: CVE-2026-56001, CVE-2026-56002, CVE-2026-56003