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CVE-2026-59679

fs_read_glyphs() heap OOB read/write via encoding array index mismatch in libXfont2 PUBLISHED

Description (CNA)

fs_read_glyphs() in the libXfont2 font-server client (src/fc/fserve.c) indexes the per-character encoding[] array using num_chars from the FS_QueryXBitmaps16 reply, but that array was allocated with a size derived from num_extents in the separate FS_QueryXExtents16 reply. The two CARD32 fields are never cross-checked. A malicious or compromised font server can send a small num_extents (e.g. 1) in the extents reply, then a large num_chars (e.g. 100000) in the bitmaps reply. This causes attacker-controlled out-of-bounds heap read and writes.

Affected (CNA)

Vendor / productVersions
SUSE / Container suse/kiosk/tigervnc-x11vnc:1.14-63.8affected ? before 2.0.3-150000.3.6.1
SUSE / Container suse/kiosk/xorg:21.1-83.7affected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAPaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-Azureaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-Azure-3Paffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-BYOSaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-BYOS-Azureaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-BYOS-EC2affected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-BYOS-GCEaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-EC2affected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-GCEaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-Hardenedaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-Hardened-Azureaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-Hardened-BYOSaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-Hardened-BYOS-Azureaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-Hardened-BYOS-EC2affected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-Hardened-BYOS-GCEaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-Hardened-EC2affected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAP-Hardened-GCEaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAPCALaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAPCAL-Azureaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAPCAL-EC2affected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP6-SAPCAL-GCEaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAP-Azureaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAP-Azure-3Paffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAP-BYOS-Azureaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAP-BYOS-EC2affected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAP-BYOS-GCEaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAP-EC2affected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAP-GCEaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAP-GCE-3Paffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAP-Hardened-Azureaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAP-Hardened-BYOS-Azureaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAP-Hardened-BYOS-EC2affected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAP-Hardened-BYOS-GCEaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAP-Hardened-GCEaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAPCAL-Azureaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAPCAL-EC2affected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES15-SP7-SAPCAL-GCEaffected ? before 2.0.3-150000.3.6.1
SUSE / Image SLES-SAP-Azureaffected ? before 2.0.7-160000.5.1
SUSE / Image SLES-SAP-Azure-3Paffected ? before 2.0.7-160000.5.1
SUSE / Image SLES-SAP-BYOS-Azureaffected ? before 2.0.7-160000.5.1
SUSE / Image SLES-SAP-BYOS-EC2affected ? before 2.0.7-160000.5.1
SUSE / Image SLES-SAP-BYOS-GCEaffected ? before 2.0.7-160000.5.1
SUSE / Image SLES-SAP-GCEaffected ? before 2.0.7-160000.5.1
SUSE / Image SLES-SAP-GCE-3Paffected ? before 2.0.7-160000.5.1
SUSE / Image SLES-SAPCAL-GCEaffected ? before 2.0.7-160000.5.1
SUSE / Image SLES12-SP5-Azure-SAP-BYOSaffected ? before 2.0.3-3.6.1
SUSE / Image SLES12-SP5-Azure-SAP-On-Demandaffected ? before 2.0.3-3.6.1
SUSE / Image SLES12-SP5-EC2-SAP-BYOSaffected ? before 2.0.3-3.6.1
SUSE / Image SLES12-SP5-EC2-SAP-On-Demandaffected ? before 2.0.3-3.6.1
SUSE / Image SLES12-SP5-GCE-SAP-BYOSaffected ? before 2.0.3-3.6.1
SUSE / Image SLES12-SP5-GCE-SAP-On-Demandaffected ? before 2.0.3-3.6.1
SUSE / SUSE Liberty Linux 10affected ? before 2.0.6-5.el10_2.3
SUSE / SUSE Liberty Linux 10affected ? before 2.0.6-5.el10_2.3
SUSE / SUSE Liberty Linux 8affected ? before 2.0.3-2.el8_10.3
SUSE / SUSE Liberty Linux 8affected ? before 2.0.3-2.el8_10.3
SUSE / SUSE Liberty Linux 9affected ? before 2.0.3-12.el9_8.3
SUSE / SUSE Liberty Linux 9affected ? before 2.0.3-12.el9_8.3
SUSE / SUSE Linux Enterprise Desktop 15 SP7affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Desktop 15 SP7affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Module for Basesystem 15 SP7affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Module for Basesystem 15 SP7affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server 15 SP7affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server 15 SP7affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server for SAP Applications 15 SP7affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server for SAP Applications 15 SP7affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOSaffected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOSaffected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise High Performance Computing 15 SP4-LTSSaffected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise High Performance Computing 15 SP4-LTSSaffected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOSaffected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOSaffected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise High Performance Computing 15 SP5-LTSSaffected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise High Performance Computing 15 SP5-LTSSaffected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server 12 SP5-LTSSaffected ? before 2.0.3-3.6.1
SUSE / SUSE Linux Enterprise Server 15 SP4-LTSSaffected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server 15 SP4-LTSSaffected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server 15 SP5-LTSSaffected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server 15 SP5-LTSSaffected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server 15 SP6-LTSSaffected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server 15 SP6-LTSSaffected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server 16.0affected ? before 2.0.7-160000.5.1
SUSE / SUSE Linux Enterprise Server 16.0affected ? before 2.0.7-160000.5.1
SUSE / SUSE Linux Enterprise Server for SAP applications 16.0affected ? before 2.0.7-160000.5.1
SUSE / SUSE Linux Enterprise Server for SAP applications 16.0affected ? before 2.0.7-160000.5.1
SUSE / SUSE Linux Enterprise Server LTSS Extended Security 12 SP5affected ? before 2.0.3-3.6.1
SUSE / SUSE Linux Enterprise Server for SAP Applications 15 SP4affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server for SAP Applications 15 SP4affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server for SAP Applications 15 SP5affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server for SAP Applications 15 SP5affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server for SAP Applications 15 SP6affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Linux Enterprise Server for SAP Applications 15 SP6affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Manager Proxy LTS 4.3affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Manager Proxy LTS 4.3affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Manager Retail Branch Server LTS 4.3affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Manager Retail Branch Server LTS 4.3affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Manager Server LTS 4.3affected ? before 2.0.3-150000.3.6.1
SUSE / SUSE Manager Server LTS 4.3affected ? before 2.0.3-150000.3.6.1
SUSE / openSUSE Leap 16.0affected ? before 2.0.7-160000.5.1

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.