Skip to content
Sign in
9.0 Critical

CVE-2026-59679 fs_read_glyphs() in the libXfont2 font-server client (src/fc/fserve.c) indexes the per-character encoding[] array…

Description

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 products and versions

Product Affected versions Fixed in
Container suse/kiosk/tigervnc-x11vnc:1.14-63.8 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Container suse/kiosk/xorg:21.1-83.7 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-Azure 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-Azure-3P 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-BYOS 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-BYOS-Azure 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-BYOS-EC2 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-BYOS-GCE 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Show the 71 other branches
Product Affected versions Fixed in
Image SLES15-SP6-SAP-EC2 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-GCE 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-Hardened 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-Hardened-Azure 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-Hardened-BYOS 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-Hardened-BYOS-Azure 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-Hardened-BYOS-EC2 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-Hardened-BYOS-GCE 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-Hardened-EC2 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAP-Hardened-GCE 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAPCAL 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAPCAL-Azure 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAPCAL-EC2 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP6-SAPCAL-GCE 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAP-Azure 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAP-Azure-3P 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAP-BYOS-Azure 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAP-BYOS-EC2 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAP-BYOS-GCE 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAP-EC2 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAP-GCE 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAP-GCE-3P 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAP-Hardened-Azure 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAP-Hardened-BYOS-Azure 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAP-Hardened-BYOS-EC2 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAP-Hardened-BYOS-GCE 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAP-Hardened-GCE 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAPCAL-Azure 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAPCAL-EC2 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES15-SP7-SAPCAL-GCE 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
Image SLES-SAP-Azure 2.0 earliest → < 2.0.7-160000.5.1 2.0.7-160000.5.1
Image SLES-SAP-Azure-3P 2.0 earliest → < 2.0.7-160000.5.1 2.0.7-160000.5.1
Image SLES-SAP-BYOS-Azure 2.0 earliest → < 2.0.7-160000.5.1 2.0.7-160000.5.1
Image SLES-SAP-BYOS-EC2 2.0 earliest → < 2.0.7-160000.5.1 2.0.7-160000.5.1
Image SLES-SAP-BYOS-GCE 2.0 earliest → < 2.0.7-160000.5.1 2.0.7-160000.5.1
Image SLES-SAP-GCE 2.0 earliest → < 2.0.7-160000.5.1 2.0.7-160000.5.1
Image SLES-SAP-GCE-3P 2.0 earliest → < 2.0.7-160000.5.1 2.0.7-160000.5.1
Image SLES-SAPCAL-GCE 2.0 earliest → < 2.0.7-160000.5.1 2.0.7-160000.5.1
Image SLES12-SP5-Azure-SAP-BYOS 2.0 earliest → < 2.0.3-3.6.1 2.0.3-3.6.1
Image SLES12-SP5-Azure-SAP-On-Demand 2.0 earliest → < 2.0.3-3.6.1 2.0.3-3.6.1
Image SLES12-SP5-EC2-SAP-BYOS 2.0 earliest → < 2.0.3-3.6.1 2.0.3-3.6.1
Image SLES12-SP5-EC2-SAP-On-Demand 2.0 earliest → < 2.0.3-3.6.1 2.0.3-3.6.1
Image SLES12-SP5-GCE-SAP-BYOS 2.0 earliest → < 2.0.3-3.6.1 2.0.3-3.6.1
Image SLES12-SP5-GCE-SAP-On-Demand 2.0 earliest → < 2.0.3-3.6.1 2.0.3-3.6.1
SUSE Liberty Linux 10 Versions not published
SUSE Liberty Linux 8 Versions not published
SUSE Liberty Linux 9 Versions not published
SUSE Linux Enterprise Desktop 15 SP7 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Linux Enterprise Module for Basesystem 15 SP7 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Linux Enterprise Server 15 SP7 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Linux Enterprise Server for SAP Applications 15 SP7 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Linux Enterprise Server 12 SP5-LTSS 2.0 earliest → < 2.0.3-3.6.1 2.0.3-3.6.1
SUSE Linux Enterprise Server 15 SP4-LTSS 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Linux Enterprise Server 15 SP5-LTSS 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Linux Enterprise Server 15 SP6-LTSS 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Linux Enterprise Server 16.0 2.0 earliest → < 2.0.7-160000.5.1 2.0.7-160000.5.1
SUSE Linux Enterprise Server for SAP applications 16.0 2.0 earliest → < 2.0.7-160000.5.1 2.0.7-160000.5.1
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 2.0 earliest → < 2.0.3-3.6.1 2.0.3-3.6.1
SUSE Linux Enterprise Server for SAP Applications 15 SP4 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Linux Enterprise Server for SAP Applications 15 SP5 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Linux Enterprise Server for SAP Applications 15 SP6 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Manager Proxy LTS 4.3 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Manager Retail Branch Server LTS 4.3 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
SUSE Manager Server LTS 4.3 2.0 earliest → < 2.0.3-150000.3.6.1 2.0.3-150000.3.6.1
openSUSE Leap 16.0 2.0 earliest → < 2.0.7-160000.5.1 2.0.7-160000.5.1
openSUSE Tumbleweed 2.0 earliest → < 2.0.7-3.1 2.0.7-3.1
libXfont2 2.0 earliest → 2.0.8 No fix stated

Other CVEs of Container suse/kiosk/tigervnc-x11vnc:1.14-63.8

The 2 CVEs of Container suse/kiosk/tigervnc-x11vnc:1.14-63.8 →
CVE-2026-44950 fs_read_glyphs() in the libXfont2 font-server client (src/fc/fserve.c) copies each glyph's bitmap into a single buffer 9.0 Critical
Track this CVE