{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-44950 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-44950 is a critical memory corruption vulnerability in Container suse/kiosk/tigervnc-x11vnc:1.14-63.8, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-44950 and fix it if it is affected.\n\nWhat it is: CVE-2026-44950 is a critical memory corruption vulnerability in Container suse/kiosk/tigervnc-x11vnc:1.14-63.8, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-44950 in the wild and no public exploit code.\n\nAffected product: Container suse/kiosk/tigervnc-x11vnc:1.14-63.8. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-44950/ (Markdown: https://insights.sbomify.com/CVE-2026-44950/index.md)","id":"CVE-2026-44950","markdown":"https://insights.sbomify.com/CVE-2026-44950/index.md","name":"CVE-2026-44950","record":{"aliases":["AZL-101733","DEBIAN-CVE-2026-44950","GHSA-72vv-3gwg-8289","UBUNTU-CVE-2026-44950"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"X11 font library","requires_auth":"none","summary":"A malicious font server can trigger a heap buffer overflow in libXfont2 via cumulative glyph data, potentially allowing arbitrary code execution.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"suse","cpe":[],"cvss":{"score":9.5,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0"},"cwes":[{"id":"CWE-122","name":"Heap-based Buffer Overflow"}],"description":"fs_read_glyphs() in the libXfont2 font-server client (src/fc/fserve.c) copies each glyph's bitmap into a single buffer. Existing checks validates only that the source slice (position, length) lies within the source bitmap buffer. It does not check whether the running destination cursor has exceeded the allocation.\n\nA malicious font server can send overlapping source offsets -- for example 1000 glyphs each referencing {position:0, length:64} with nbytes=64. Each individual source range passes the existing validation, but the cumulative writes total 64000 bytes into a 64-byte destination buffer. This is a heap buffer overflow with attacker-controlled content.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"fs_read_glyphs() heap buffer overflow via cumulative glyph data overflow in libXfont2","id":"CVE-2026-44950","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Exposure of Sensitive System Information to an Unauthorized Control Sphere in Panduit IntraVUE by Pronetiqs","id":"CVE-2026-44955"},"packages":[],"prev":{"headline":"Unauthenticated namespace creation and RBAC injection via rancher-webhook FleetWorkspace mutating webhook","id":"CVE-2026-44949"},"products":["Container suse/kiosk/tigervnc-x11vnc:1.14-63.8","Container suse/kiosk/xorg:21.1-83.7","Image SLES-SAP-Azure","Image SLES-SAP-Azure-3P","Image SLES-SAP-BYOS-Azure","Image SLES-SAP-BYOS-EC2","Image SLES-SAP-BYOS-GCE","Image SLES-SAP-GCE","Image SLES-SAP-GCE-3P","Image SLES-SAPCAL-GCE","Image SLES12-SP5-Azure-SAP-BYOS","Image SLES12-SP5-Azure-SAP-On-Demand","Image SLES12-SP5-EC2-SAP-BYOS","Image SLES12-SP5-EC2-SAP-On-Demand","Image SLES12-SP5-GCE-SAP-BYOS","Image SLES12-SP5-GCE-SAP-On-Demand","Image SLES15-SP6-SAP","Image SLES15-SP6-SAP-Azure","Image SLES15-SP6-SAP-Azure-3P","Image SLES15-SP6-SAP-BYOS","Image SLES15-SP6-SAP-BYOS-Azure","Image SLES15-SP6-SAP-BYOS-EC2","Image SLES15-SP6-SAP-BYOS-GCE","Image SLES15-SP6-SAP-EC2","Image SLES15-SP6-SAP-GCE","Image SLES15-SP6-SAP-Hardened","Image SLES15-SP6-SAP-Hardened-Azure","Image SLES15-SP6-SAP-Hardened-BYOS","Image SLES15-SP6-SAP-Hardened-BYOS-Azure","Image SLES15-SP6-SAP-Hardened-BYOS-EC2","Image SLES15-SP6-SAP-Hardened-BYOS-GCE","Image SLES15-SP6-SAP-Hardened-EC2","Image SLES15-SP6-SAP-Hardened-GCE","Image SLES15-SP6-SAPCAL","Image SLES15-SP6-SAPCAL-Azure","Image SLES15-SP6-SAPCAL-EC2","Image SLES15-SP6-SAPCAL-GCE","Image SLES15-SP7-SAP-Azure","Image SLES15-SP7-SAP-Azure-3P","Image SLES15-SP7-SAP-BYOS-Azure","Image SLES15-SP7-SAP-BYOS-EC2","Image SLES15-SP7-SAP-BYOS-GCE","Image SLES15-SP7-SAP-EC2","Image SLES15-SP7-SAP-GCE","Image SLES15-SP7-SAP-GCE-3P","Image SLES15-SP7-SAP-Hardened-Azure","Image SLES15-SP7-SAP-Hardened-BYOS-Azure","Image SLES15-SP7-SAP-Hardened-BYOS-EC2","Image SLES15-SP7-SAP-Hardened-BYOS-GCE","Image SLES15-SP7-SAP-Hardened-GCE","Image SLES15-SP7-SAPCAL-Azure","Image SLES15-SP7-SAPCAL-EC2","Image SLES15-SP7-SAPCAL-GCE","SUSE Liberty Linux 10","SUSE Liberty Linux 8","SUSE Liberty Linux 9","SUSE Linux Enterprise Desktop 15 SP7","SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS","SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS","SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS","SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS","SUSE Linux Enterprise Module for Basesystem 15 SP7","SUSE Linux Enterprise Server 12 SP5-LTSS","SUSE Linux Enterprise Server 15 SP4-LTSS","SUSE Linux Enterprise Server 15 SP5-LTSS","SUSE Linux Enterprise Server 15 SP6-LTSS","SUSE Linux Enterprise Server 15 SP7","SUSE Linux Enterprise Server 16.0","SUSE Linux Enterprise Server LTSS Extended Security 12 SP5","SUSE Linux Enterprise Server for SAP Applications 15 SP4","SUSE Linux Enterprise Server for SAP Applications 15 SP5","SUSE Linux Enterprise Server for SAP Applications 15 SP6","SUSE Linux Enterprise Server for SAP Applications 15 SP7","SUSE Linux Enterprise Server for SAP applications 16.0","SUSE Manager Proxy LTS 4.3","SUSE Manager Retail Branch Server LTS 4.3","SUSE Manager Server LTS 4.3","libXfont","openSUSE Leap 16.0","openSUSE Tumbleweed"],"published":"2026-09-10","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-10","vendors":["SUSE","libXfont"]},"summary":"A malicious font server can trigger a heap buffer overflow in libXfont2 via cumulative glyph data, potentially allowing arbitrary code execution.","url":"https://insights.sbomify.com/CVE-2026-44950/"}