CVE-2026-59679 PUBLISHED

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

Assigner: suse
Reserved: 06.07.2026 Published: 10.09.2026 Updated: 10.09.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 9.2

Product Status

Vendor SUSE
Product Container suse/kiosk/tigervnc-x11vnc:1.14-63.8
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Container suse/kiosk/xorg:21.1-83.7
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-Azure
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-Azure-3P
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-BYOS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-BYOS-Azure
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-BYOS-EC2
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-BYOS-GCE
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-EC2
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-GCE
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-Hardened
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-Hardened-Azure
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-Hardened-BYOS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-Hardened-BYOS-Azure
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-Hardened-BYOS-EC2
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-Hardened-BYOS-GCE
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-Hardened-EC2
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAP-Hardened-GCE
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAPCAL
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAPCAL-Azure
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAPCAL-EC2
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP6-SAPCAL-GCE
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAP-Azure
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAP-Azure-3P
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAP-BYOS-Azure
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAP-BYOS-EC2
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAP-BYOS-GCE
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAP-EC2
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAP-GCE
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAP-GCE-3P
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAP-Hardened-Azure
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAP-Hardened-BYOS-Azure
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAP-Hardened-BYOS-EC2
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAP-Hardened-BYOS-GCE
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAP-Hardened-GCE
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAPCAL-Azure
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAPCAL-EC2
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES15-SP7-SAPCAL-GCE
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product Image SLES-SAP-Azure
Versions Default: unaffected
  • affected from ? to 2.0.7-160000.5.1 (excl.)
Vendor SUSE
Product Image SLES-SAP-Azure-3P
Versions Default: unaffected
  • affected from ? to 2.0.7-160000.5.1 (excl.)
Vendor SUSE
Product Image SLES-SAP-BYOS-Azure
Versions Default: unaffected
  • affected from ? to 2.0.7-160000.5.1 (excl.)
Vendor SUSE
Product Image SLES-SAP-BYOS-EC2
Versions Default: unaffected
  • affected from ? to 2.0.7-160000.5.1 (excl.)
Vendor SUSE
Product Image SLES-SAP-BYOS-GCE
Versions Default: unaffected
  • affected from ? to 2.0.7-160000.5.1 (excl.)
Vendor SUSE
Product Image SLES-SAP-GCE
Versions Default: unaffected
  • affected from ? to 2.0.7-160000.5.1 (excl.)
Vendor SUSE
Product Image SLES-SAP-GCE-3P
Versions Default: unaffected
  • affected from ? to 2.0.7-160000.5.1 (excl.)
Vendor SUSE
Product Image SLES-SAPCAL-GCE
Versions Default: unaffected
  • affected from ? to 2.0.7-160000.5.1 (excl.)
Vendor SUSE
Product Image SLES12-SP5-Azure-SAP-BYOS
Versions Default: unaffected
  • affected from ? to 2.0.3-3.6.1 (excl.)
Vendor SUSE
Product Image SLES12-SP5-Azure-SAP-On-Demand
Versions Default: unaffected
  • affected from ? to 2.0.3-3.6.1 (excl.)
Vendor SUSE
Product Image SLES12-SP5-EC2-SAP-BYOS
Versions Default: unaffected
  • affected from ? to 2.0.3-3.6.1 (excl.)
Vendor SUSE
Product Image SLES12-SP5-EC2-SAP-On-Demand
Versions Default: unaffected
  • affected from ? to 2.0.3-3.6.1 (excl.)
Vendor SUSE
Product Image SLES12-SP5-GCE-SAP-BYOS
Versions Default: unaffected
  • affected from ? to 2.0.3-3.6.1 (excl.)
Vendor SUSE
Product Image SLES12-SP5-GCE-SAP-On-Demand
Versions Default: unaffected
  • affected from ? to 2.0.3-3.6.1 (excl.)
Vendor SUSE
Product SUSE Liberty Linux 10
Versions Default: unaffected
  • affected from ? to 2.0.6-5.el10_2.3 (excl.)
Vendor SUSE
Product SUSE Liberty Linux 10
Versions Default: unaffected
  • affected from ? to 2.0.6-5.el10_2.3 (excl.)
Vendor SUSE
Product SUSE Liberty Linux 8
Versions Default: unaffected
  • affected from ? to 2.0.3-2.el8_10.3 (excl.)
Vendor SUSE
Product SUSE Liberty Linux 8
Versions Default: unaffected
  • affected from ? to 2.0.3-2.el8_10.3 (excl.)
Vendor SUSE
Product SUSE Liberty Linux 9
Versions Default: unaffected
  • affected from ? to 2.0.3-12.el9_8.3 (excl.)
Vendor SUSE
Product SUSE Liberty Linux 9
Versions Default: unaffected
  • affected from ? to 2.0.3-12.el9_8.3 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Desktop 15 SP7
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Desktop 15 SP7
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Module for Basesystem 15 SP7
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Module for Basesystem 15 SP7
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server 15 SP7
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server 15 SP7
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server for SAP Applications 15 SP7
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server for SAP Applications 15 SP7
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server 12 SP5-LTSS
Versions Default: unaffected
  • affected from ? to 2.0.3-3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server 15 SP4-LTSS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server 15 SP4-LTSS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server 15 SP5-LTSS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server 15 SP5-LTSS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server 15 SP6-LTSS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server 15 SP6-LTSS
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server 16.0
Versions Default: unaffected
  • affected from ? to 2.0.7-160000.5.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server 16.0
Versions Default: unaffected
  • affected from ? to 2.0.7-160000.5.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server for SAP applications 16.0
Versions Default: unaffected
  • affected from ? to 2.0.7-160000.5.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server for SAP applications 16.0
Versions Default: unaffected
  • affected from ? to 2.0.7-160000.5.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server LTSS Extended Security 12 SP5
Versions Default: unaffected
  • affected from ? to 2.0.3-3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server for SAP Applications 15 SP4
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server for SAP Applications 15 SP4
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server for SAP Applications 15 SP5
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server for SAP Applications 15 SP5
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server for SAP Applications 15 SP6
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Linux Enterprise Server for SAP Applications 15 SP6
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Manager Proxy LTS 4.3
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Manager Proxy LTS 4.3
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Manager Retail Branch Server LTS 4.3
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Manager Retail Branch Server LTS 4.3
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Manager Server LTS 4.3
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product SUSE Manager Server LTS 4.3
Versions Default: unaffected
  • affected from ? to 2.0.3-150000.3.6.1 (excl.)
Vendor SUSE
Product openSUSE Leap 16.0
Versions Default: unaffected
  • affected from ? to 2.0.7-160000.5.1 (excl.)
Vendor SUSE
Product openSUSE Leap 16.0
Versions Default: unaffected
  • affected from ? to 2.0.7-160000.5.1 (excl.)
Vendor SUSE
Product openSUSE Tumbleweed
Versions Default: unaffected
  • affected from ? to 2.0.7-3.1 (excl.)
Vendor SUSE
Product openSUSE Tumbleweed
Versions Default: unaffected
  • affected from ? to 2.0.7-3.1 (excl.)
Vendor SUSE
Product openSUSE Tumbleweed
Versions Default: unaffected
  • affected from ? to 2.0.7-3.1 (excl.)
Vendor SUSE
Product openSUSE Tumbleweed
Versions Default: unaffected
  • affected from ? to 2.0.7-3.1 (excl.)
Vendor libXfont2
Product libXfont2
Versions Default: unaffected
  • affected from ? to 2.0.8 (incl.)

Credits

  • zx (Jace) finder

References