{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-34085", "tracking": { "current_release_date": "2026-04-02T18:48:14.841064Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-34085", "initial_release_date": "2026-03-25T17:37:43.894624Z", "revision_history": [ { "date": "2026-03-25T17:37:43.894624Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-03-25T17:37:46.783479Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-25T17:39:04.807542Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products created (1).| References created (3).| CWES updated (1)." }, { "date": "2026-03-25T17:39:07.038786Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-26T12:27:45.324329Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (5).| Product Identifiers created (5).| Product Remediations created (11).| Products created (6).| References created (5).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-03-26T12:27:48.015979Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-03-26T12:43:16.866589Z", "number": "7", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products created (2)." }, { "date": "2026-03-26T12:43:19.646217Z", "number": "8", "summary": "NCSC Score updated." }, { "date": "2026-03-26T15:00:58.018418Z", "number": "9", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-27T19:41:00.666619Z", "number": "10", "summary": "Source connected.| CVE status created. (valid)| CVSS created.| CWES updated (1)." }, { "date": "2026-03-27T19:41:11.068080Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-03-27T19:42:38.317059Z", "number": "12", "summary": "Products created (1).| Products removed (1)." }, { "date": "2026-03-27T19:46:06.368355Z", "number": "13", "summary": "Unknown change." }, { "date": "2026-03-28T07:39:59.809266Z", "number": "14", "summary": "Products created (1).| Product Identifiers created (1)." }, { "date": "2026-03-28T07:40:01.442611Z", "number": "15", "summary": "NCSC Score updated." }, { "date": "2026-03-28T07:41:00.555084Z", "number": "16", "summary": "Products created (1).| Product Identifiers created (1)." }, { "date": "2026-03-28T07:41:20.331899Z", "number": "17", "summary": "Products created (1).| Products removed (1)." }, { "date": "2026-03-28T07:41:22.529894Z", "number": "18", "summary": "NCSC Score updated." }, { "date": "2026-03-31T06:19:49.634491Z", "number": "19", "summary": "Products created (1).| Product Identifiers created (1)." }, { "date": "2026-03-31T06:19:54.051681Z", "number": "20", "summary": "NCSC Score updated." }, { "date": "2026-04-02T18:47:56.241888Z", "number": "21", "summary": "Products created (1).| Products removed (1)." } ], "status": "interim", "version": "21" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<2.17.1", "product": { "name": "vers:unknown/<2.17.1", "product_id": "CSAFPID-5956286", "product_identification_helper": { "cpe": "cpe:2.3:a:fontconfig_project:fontconfig:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "Fontconfig" } ], "category": "vendor", "name": "Fontconfig Project" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/10", "product": { "name": "vers:rpm/10", "product_id": "CSAFPID-2858634", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:10" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 10" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/6", "product": { "name": "vers:rpm/6", "product_id": "CSAFPID-1439321", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:6" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 6" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/7", "product": { "name": "vers:rpm/7", "product_id": "CSAFPID-1439315", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:7" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 7" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/8", "product": { "name": "vers:rpm/8", "product_id": "CSAFPID-1439317", "product_identification_helper": { "cpe": "cpe:/o:redhat:enterprise_linux:8" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 8" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/9", "product": { "name": "vers:rpm/9", "product_id": "CSAFPID-1439319", "product_identification_helper": { "cpe": "cpe:/a:redhat:enterprise_linux:9" } } } ], "category": "product_name", "name": "Red Hat Enterprise Linux 9" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5917067" } } ], "category": "product_name", "name": "fontconfig" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 10" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5917069" } } ], "category": "product_name", "name": "fontconfig" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 6" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5917070" } } ], "category": "product_name", "name": "fontconfig" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 7" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5917072" } } ], "category": "product_name", "name": "fontconfig" }, { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5917073" } } ], "category": "product_name", "name": "mingw-fontconfig" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 8" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:rpm/unknown", "product": { "name": "vers:rpm/unknown", "product_id": "CSAFPID-5917074" } } ], "category": "product_name", "name": "fontconfig" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 9" } ], "category": "vendor", "name": "Red Hat" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/*", "product": { "name": "vers:microsoft/*", "product_id": "CSAFPID-5956322", "product_identification_helper": { "cpe": "cpe:2.3:a:microsoft:azl3_fontconfig_2.14.2-1:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "azl3 fontconfig 2.14.2-1 on Azure Linux 3.0" }, { "branches": [ { "category": "product_version_range", "name": "vers:microsoft/*", "product": { "name": "vers:microsoft/*", "product_id": "CSAFPID-5967081", "product_identification_helper": { "cpe": "cpe:2.3:a:microsoft:cbl2_fontconfig_2.13.95-1:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "cbl2 fontconfig 2.13.95-1 on CBL Mariner 2.0" } ], "category": "product_family", "name": "Open Source Software" } ], "category": "vendor", "name": "Microsoft" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/*", "product": { "name": "vers:deb/*", "product_id": "CSAFPID-5956341" } } ], "category": "product_name", "name": "fontconfig" } ], "category": "product_family", "name": "bookworm" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/*", "product": { "name": "vers:deb/*", "product_id": "CSAFPID-5941483" } } ], "category": "product_name", "name": "fontconfig" } ], "category": "product_family", "name": "bullseye" } ], "category": "vendor", "name": "Debian" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:semver/<2.17.1", "product": { "name": "vers:semver/<2.17.1", "product_id": "CSAFPID-5985235" } } ], "category": "product_name", "name": "fontconfig" } ], "category": "vendor", "name": "fontconfig project" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-34085", "cwe": { "id": "CWE-193", "name": "Off-by-one Error" }, "notes": [ { "category": "description", "text": "fontconfig before 2.17.1 has an off-by-one error in allocation during sfnt capability handling, leading to a one-byte out-of-bounds write, and potentially a crash or code execution. This is in FcFontCapabilities in fcfreetype.c.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34085" }, { "category": "description", "text": "fontconfig before 2.17.1 has an off-by-one error in allocation during sfnt capability handling, leading to a one-byte out-of-bounds write, and potentially a crash or code execution. This is in FcFontCapabilities in fcfreetype.c.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/34xxx/CVE-2026-34085.json" }, { "category": "description", "text": "A flaw was found in fontconfig. This vulnerability, an off-by-one error in how fontconfig handles font capabilities, could allow a local attacker to cause a one-byte out-of-bounds write. This issue may lead to a system crash, resulting in a Denial of Service (DoS), or potentially enable the attacker to execute unauthorized code.", "title": "redhat - https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-34085.json" }, { "category": "description", "text": "fontconfig before 2.17.1 has an off-by-one error in allocation during sfnt capability handling, leading to a one-byte out-of-bounds write, and potentially a crash or code execution. This is in FcFontCapabilities in fcfreetype.c.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-34085" }, { "category": "other", "text": "0.00013", "title": "EPSS" }, { "category": "other", "text": "4.5", "title": "NCSC Score" }, { "category": "other", "text": "There is product_remediation data available from source Redhat, There is cwe data available from source Nvd, The value of the most recent EPSS score", "title": "NCSC Score top decreasing factors" }, { "category": "details", "text": "Severity: 2\n", "title": "Vendor assessment" } ], "product_status": { "known_affected": [ "CSAFPID-1439315", "CSAFPID-1439317", "CSAFPID-1439319", "CSAFPID-1439321", "CSAFPID-2858634", "CSAFPID-5917067", "CSAFPID-5917069", "CSAFPID-5917070", "CSAFPID-5917072", "CSAFPID-5917073", "CSAFPID-5917074", "CSAFPID-5956286", "CSAFPID-5956322", "CSAFPID-5967081", "CSAFPID-5985235" ], "known_not_affected": [ "CSAFPID-5941483", "CSAFPID-5956341" ] }, "references": [ { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-34085" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/34xxx/CVE-2026-34085.json" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-34085.json" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-34085" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Source - microsoft", "url": "https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2026-Mar" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://gitlab.freedesktop.org/fontconfig/fontconfig/-/commit/b9bec06d73340f1b5727302d13ac3df307b7febc" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://gitlab.freedesktop.org/fontconfig/fontconfig/-/merge_requests/446" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd; redhat", "url": "https://gitlab.freedesktop.org/fontconfig/fontconfig/-/work_items/481" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-34085" }, { "category": "external", "summary": "Reference - redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34085" } ], "remediations": [ { "category": "mitigation", "details": "Red Hat is not aware of a practical temporary workaround that fully mitigates this issue or meets Red Hat Product Security's standards for usability, deployment, applicability, or stability.", "product_ids": [ "CSAFPID-1439315", "CSAFPID-1439317", "CSAFPID-1439319", "CSAFPID-1439321", "CSAFPID-2858634", "CSAFPID-5917067", "CSAFPID-5917069", "CSAFPID-5917070", "CSAFPID-5917072", "CSAFPID-5917073", "CSAFPID-5917074" ] } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H", "baseScore": 6.6, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-1439315", "CSAFPID-1439317", "CSAFPID-1439319", "CSAFPID-1439321", "CSAFPID-2858634", "CSAFPID-5917067", "CSAFPID-5917069", "CSAFPID-5917070", "CSAFPID-5917072", "CSAFPID-5917073", "CSAFPID-5917074", "CSAFPID-5956286", "CSAFPID-5956322", "CSAFPID-5967081", "CSAFPID-5985235" ] } ], "title": "CVE-2026-34085" } ] }