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GStreamer H.266 Codec Parser Integer Underflow Remote Code Execution Vulnerability

Type: advisorySources: OSV

GStreamer H.266 Codec Parser Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the parsing of picture partitions. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28910.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-3084
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 11:10 UTC · Revision 1

Source evidence

GStreamer H.266 Codec Parser Integer Underflow Remote Code Execution Vulnerability

core-osv · Original source

Published 13 Mar 2026, 20:42 UTC

GStreamer H.266 Codec Parser Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the parsing of picture partitions. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28910.

osv:CVE-2026-3084
Complete source record
{
  "id": "0f9d18bc050469583515ef3b71f7568e4760ffbaae869bd95e10c38e86072864",
  "url": "https://osv.dev/vulnerability/CVE-2026-3084",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "GStreamer H.266 Codec Parser Integer Underflow Remote Code Execution Vulnerability",
    "summary": "GStreamer H.266 Codec Parser Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the parsing of picture partitions. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28910.",
    "evidence": "osv:CVE-2026-3084",
    "products": [],
    "severity": "high",
    "structured": {
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      "aliases": [
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          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
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            "CHANGELOG_START",
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          "database_specific": {
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      ],
      "modified": "2026-10-28T02:30:28.002229137Z",
      "provider": "osv",
      "references": [
        "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3084.json",
        "https://access.redhat.com/security/cve/CVE-2026-3084",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3084.json",
        "https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/496e4f296e658fba7fd40027d3bbe6095633ec91",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-3084",
        "https://www.zerodayinitiative.com/advisories/ZDI-26-169/",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2447483"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-191"
        ],
        "cna_assigner": "zdi",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3084.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-3084",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 494855,
  "published_at": "2026-03-13T20:42:03.443+00:00"
}