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Slackware 15.0 libXfont2 Critical Heap Overflow Fix 2026-189-01

slackware
Calendar Grey July 8, 2026
Dist Slackware Esm H88
New libXfont2 packages for Slackware address critical heap buffer overflows related to font parsing and more.
New libXfont2 packages are available for Slackware 15.0 and -current to fix security issues.

Summary

Here are the details from the Slackware 15.0 ChangeLog: patches/packages/libXfont2-2.0.8-i586-1_slack15.0.txz: Upgraded. This update fixes security issues: BitmapScaleBitmaps Integer Overflow Heap Buffer Overflow. PCF Font Parsing Heap Buffer Overflow. computeProps Property Buffer Heap Buffer Overflow. For more information, see: https://lists.x.org/archives/xorg/2026-July/062253.html https://www.cve.org/CVERecord?id=CVE-2026-56001 https://www.cve.org/CVERecord?id=CVE-2026-56002 https://www.cve.org/CVERecord?id=CVE-2026-56003 (* Security fix *)

Topics%20covered

Topics Covered

security advisory critical slackware integer overflow heap buffer PCF font parsing

Where Find New Packages

Thanks to the friendly folks at the OSU Open Source Lab (http://osuosl.org) for donating FTP and rsync hosting to the Slackware project! :-)
Also see the "Get Slack" section on http://slackware.com for additional mirror sites near you.
Updated package for Slackware 15.0: ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/libXfont2-2.0.8-i586-1_slack15.0.txz
Updated package for Slackware x86_64 15.0: ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/patches/packages/libXfont2-2.0.8-x86_64-1_slack15.0.txz
Updated package for Slackware -current: ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/x/libXfont2-2.0.8-i686-1.txz
Updated package for Slackware x86_64 -current: ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/x/libXfont2-2.0.8-x86_64-1.txz

MD5 Signatures

Slackware 15.0 package: 15a36c81b360d94bc803b65560d94934 libXfont2-2.0.8-i586-1_slack15.0.txz
Slackware x86_64 15.0 package: 11450cfb5cfb79181d49bcd02cc81554 libXfont2-2.0.8-x86_64-1_slack15.0.txz
Slackware -current package: a4aa589efa9b9571fcbe729d0c97c524 x/libXfont2-2.0.8-i686-1.txz
Slackware x86_64 -current package: 719ba3cd0d28b303f6b78d16195ad879 x/libXfont2-2.0.8-x86_64-1.txz

Severity
critical
Lowest
Low
Medium
High
Critical

Topics%20covered

Topics Covered

security advisory critical slackware integer overflow heap buffer PCF font parsing

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Installation Instructions

Installation instructions: Upgrade the package as root: # upgradepkg libXfont2-2.0.8-i586-1_slack15.0.txz