{ "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-2026-100231", "tracking": { "current_release_date": "2026-10-19T20:09:20.999256Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-100231", "initial_release_date": "2026-10-14T10:29:42.541134Z", "revision_history": [ { "date": "2026-10-14T10:29:42.541134Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-10-14T10:29:52.849452Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-10-14T10:38:40.864759Z", "number": "3", "summary": "CVSS created.| CWES created (1).| Products created (4).| References created (2).| Description created for source.| Unknown change.| Product Identifiers created (4)." }, { "date": "2026-10-14T10:38:50.007450Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-10-14T11:35:00.552570Z", "number": "5", "summary": "NCSC Score updated." }, { "date": "2026-10-14T12:30:46.261028Z", "number": "6", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (8).| Product Identifiers created (4).| Product Remediations created (8).| References created (2).| CWES updated (1).| Vendor_assessment created." }, { "date": "2026-10-14T12:30:52.078422Z", "number": "7", "summary": "NCSC Score updated." }, { "date": "2026-10-15T06:03:16.465412Z", "number": "8", "summary": "EPSS created.| Unknown change." }, { "date": "2026-10-15T18:06:31.767175Z", "number": "9", "summary": "Source connected.| CVE status created. (valid)| Products connected (1).| References created (4)." }, { "date": "2026-10-15T18:06:45.436032Z", "number": "10", "summary": "NCSC Score updated." }, { "date": "2026-10-18T00:43:48.734297Z", "number": "11", "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products connected (1)." }, { "date": "2026-10-18T00:43:53.575654Z", "number": "12", "summary": "NCSC Score updated." }, { "date": "2026-10-19T20:09:12.430881Z", "number": "13", "summary": "Unknown change." }, { "date": "2026-10-19T20:09:14.398172Z", "number": "14", "summary": "NCSC Score updated." } ], "status": "interim", "version": "14" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/unknown", "product": { "name": "vers:unknown/unknown", "product_id": "CSAFPID-2833636", "product_identification_helper": { "cpe": "cpe:/a:open_source:gstreamer:-" } } } ], "category": "product_name", "name": "Open Source GStreamer" } ], "category": "vendor", "name": "Open Source" }, { "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/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:/o: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-8334372" } } ], "category": "product_name", "name": "gstreamer1-plugins-bad-free" } ], "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-8334373" } } ], "category": "product_name", "name": "gstreamer1-plugins-bad-free" } ], "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-8334374" } } ], "category": "product_name", "name": "gstreamer1-plugins-bad-free" } ], "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-8334375" } } ], "category": "product_name", "name": "gstreamer1-plugins-bad-free" } ], "category": "product_family", "name": "Red Hat Enterprise Linux 9" } ], "category": "vendor", "name": "Red Hat" }, { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:deb/unknown", "product": { "name": "vers:deb/unknown", "product_id": "CSAFPID-2859885" } } ], "category": "product_name", "name": "gst-plugins-bad1.0" } ], "category": "product_family", "name": "bookworm" } ], "category": "vendor", "name": "Debian" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-100231", "cwe": { "id": "CWE-787", "name": "Out-of-bounds Write" }, "notes": [ { "category": "description", "text": "A flaw was found in the GStreamer multimedia framework's ASF muxer plugin (asfmux). When writing string metadata tags containing Unicode characters outside the Basic Multilingual Plane (such as emoji) to an ASF container, the plugin incorrectly calculates the buffer size needed for the UTF-16LE representation. The size calculation assumes each Unicode code point requires 2 bytes, but non-BMP characters require 4 bytes (surrogate pairs). This leads to a heap out-of-bounds write when the actual UTF-16LE conversion is written into the undersized buffer. An attacker could exploit this by providing media with crafted metadata tags to an application that transcodes or remuxes to ASF format while preserving metadata, potentially causing a denial of service or limited memory corruption.", "title": "nvd - https://nvd.nist.gov/vuln/detail/CVE-2026-100231" }, { "category": "description", "text": "A flaw was found in the GStreamer multimedia framework's ASF muxer plugin (asfmux). When writing string metadata tags containing Unicode characters outside the Basic Multilingual Plane (such as emoji) to an ASF container, the plugin incorrectly calculates the buffer size needed for the UTF-16LE representation. The size calculation assumes each Unicode code point requires 2 bytes, but non-BMP characters require 4 bytes (surrogate pairs). This leads to a heap out-of-bounds write when the actual UTF-16LE conversion is written into the undersized buffer. An attacker could exploit this by providing media with crafted metadata tags to an application that transcodes or remuxes to ASF format while preserving metadata, potentially causing a denial of service or limited memory corruption.", "title": "cveprojectv5 - https://www.cve.org/CVERecord?id=CVE-2026-100231" }, { "category": "description", "text": "A flaw was found in the GStreamer multimedia framework's ASF muxer plugin (asfmux). When writing string metadata tags containing Unicode characters outside the Basic Multilingual Plane (such as emoji) to an ASF container, the plugin incorrectly calculates the buffer size needed for the UTF-16LE representation. The size calculation assumes each Unicode code point requires 2 bytes, but non-BMP characters require 4 bytes (surrogate pairs). This leads to a heap out-of-bounds write when the actual UTF-16LE conversion is written into the undersized buffer. An attacker could exploit this by providing media with crafted metadata tags to an application that transcodes or remuxes to ASF format while preserving metadata, potentially causing a denial of service or limited memory corruption.\nThis vulnerability is rated as Moderate severity because exploitation requires a user or application to process untrusted media through a GStreamer pipeline that muxes output to ASF, WMA, or WMV while preserving string metadata (for example title or artist). That transcoding or remuxing scenario is uncommon compared with playback or demuxing. The reporter and Red Hat static analysis confirmed a deterministic heap out-of-bounds write that can crash the process; code execution was not demonstrated.\nThe flaw is in the asfmux element shipped in the gstreamer1-plugins-bad-free package. Standard ASLR and heap protections on Red Hat platforms increase the difficulty of turning the overflow into code execution beyond denial of service.\nRed Hat Enterprise Linux and Red Hat In-Vehicle OS ship this package and are affected on supported update streams. Fedora community packages gstreamer1-plugins-bad-free and mingw-gstreamer1-plugins-bad-free are affected; resolution is delegated to Fedora maintainers.\nRed Hat will provide fixes after upstream releases a correction and coordinated disclosure completes. Until then, if ASF muxing is not required, disable or remove the asfmux GStreamer plugin, or avoid propagating untrusted metadata into an asfmux pipeline. See the flaw mitigation field for build-time and runtime options.", "title": "redhat - https://access.redhat.com/security/cve/CVE-2026-100231" }, { "category": "description", "text": "A flaw was found in the GStreamer multimedia framework's ASF muxer plugin (asfmux). When writing string metadata tags containing Unicode characters outside the Basic Multilingual Plane (such as emoji) to an ASF container, the plugin incorrectly calculates the buffer size needed for the UTF-16LE representation. The size calculation assumes each Unicode code point requires 2 bytes, but non-BMP characters require 4 bytes (surrogate pairs). This leads to a heap out-of-bounds write when the actual UTF-16LE conversion is written into the undersized buffer. An attacker could exploit this by providing media with crafted metadata tags to an application that transcodes or remuxes to ASF format while preserving metadata, potentially causing a denial of service or limited memory corruption.", "title": "debian - https://security-tracker.debian.org/tracker/CVE-2026-100231" }, { "category": "other", "text": "0.00151", "title": "EPSS" }, { "category": "other", "text": "3.5", "title": "NCSC Score" }, { "category": "other", "text": "There is product data available from source Certbundde", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "There is product_remediation data available from source Redhat, There is cwe data available from source Nvd, Is related to a product by vendor Debian, 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-2858634", "CSAFPID-8334372", "CSAFPID-8334373", "CSAFPID-8334374", "CSAFPID-8334375", "CSAFPID-2833636", "CSAFPID-2859885" ] }, "references": [ { "category": "external", "summary": "Source - nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-100231" }, { "category": "external", "summary": "Source - ncscclear", "url": "https://vulnerabilities.ncsc.nl/manual/CVE-2026-100231" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://www.cve.org/CVERecord?id=CVE-2026-100231" }, { "category": "external", "summary": "Source - redhat", "url": "https://access.redhat.com/security/cve/CVE-2026-100231" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3958.json" }, { "category": "external", "summary": "Source - debian", "url": "https://security-tracker.debian.org/tracker/CVE-2026-100231" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://access.redhat.com/security/cve/CVE-2026-100231" }, { "category": "external", "summary": "Reference - cveprojectv5; nvd", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541468" }, { "category": "external", "summary": "Reference - redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-100231" }, { "category": "external", "summary": "Reference - redhat", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-100231" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3958.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-3958" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-QXFV-RJQ3-MG7M" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-8G53-2C85-3XHF" } ], "remediations": [ { "category": "mitigation", "details": "The asfmux plugin can be disabled at build time by passing `-Dgst-plugins-bad:asfmux=disabled` to meson when building GStreamer, or by removing/unloading the `libgstasfmux.so` shared library from the GStreamer plugin directory at runtime. Applications that do not require ASF muxing functionality are not affected. If ASF muxing is required, applications should sanitize metadata tags to remove non-BMP Unicode characters before passing them to the asfmux element.", "product_ids": [ "CSAFPID-1439315", "CSAFPID-1439317", "CSAFPID-1439319", "CSAFPID-2858634", "CSAFPID-8334372", "CSAFPID-8334373", "CSAFPID-8334374", "CSAFPID-8334375" ] } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H", "baseScore": 6.1, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-1439315", "CSAFPID-1439317", "CSAFPID-1439319", "CSAFPID-2833636", "CSAFPID-2858634", "CSAFPID-2859885", "CSAFPID-8334372", "CSAFPID-8334373", "CSAFPID-8334374", "CSAFPID-8334375" ] } ], "title": "CVE-2026-100231" } ] }