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UBUNTU-CVE-2026-18649 (CVE-2026-18649)

Vulnerability from osv_ubuntu – Published: 2026-08-06 08:16 – Updated: 2026-09-17 16:37 – Source website
VLAI
Details

A flaw was found in the GStreamer gst-plugins-good package. The rtph264depay and rtph265depay RTP depayloader elements do not enforce a maximum size limit on the reassembly buffer used during fragmented RTP packet processing. A remote, unauthenticated attacker can send a continuous stream of RTP fragments without ever transmitting an end-of-fragment marker, causing the reassembly buffer to grow without bound until process memory is exhausted. This results in a denial of service through process termination.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "gstreamer1.0-plugins-good",
            "binary_version": "1.8.3-1ubuntu0.5+esm2"
          },
          {
            "binary_name": "gstreamer1.0-pulseaudio",
            "binary_version": "1.8.3-1ubuntu0.5+esm2"
          },
          {
            "binary_name": "libgstreamer-plugins-good1.0-0",
            "binary_version": "1.8.3-1ubuntu0.5+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "gst-plugins-good1.0",
        "purl": "pkg:deb/ubuntu/gst-plugins-good1.0@1.8.3-1ubuntu0.5+esm2?arch=source\u0026distro=esm-infra-legacy/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.3-1ubuntu0.5+esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6.0-1ubuntu1",
        "1.6.1-1ubuntu1",
        "1.6.2-1ubuntu1",
        "1.7.1-1ubuntu1",
        "1.7.2-1ubuntu1",
        "1.7.90-1ubuntu1",
        "1.7.91-1ubuntu1",
        "1.8.0-1ubuntu1",
        "1.8.1-1ubuntu0.1",
        "1.8.2-1ubuntu0.1",
        "1.8.2-1ubuntu0.2",
        "1.8.2-1ubuntu0.3",
        "1.8.3-1ubuntu0.3",
        "1.8.3-1ubuntu0.4",
        "1.8.3-1ubuntu0.5",
        "1.8.3-1ubuntu0.5+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "gstreamer1.0-gtk3",
            "binary_version": "1.14.5-0ubuntu1~18.04.3+esm2"
          },
          {
            "binary_name": "gstreamer1.0-plugins-good",
            "binary_version": "1.14.5-0ubuntu1~18.04.3+esm2"
          },
          {
            "binary_name": "gstreamer1.0-pulseaudio",
            "binary_version": "1.14.5-0ubuntu1~18.04.3+esm2"
          },
          {
            "binary_name": "gstreamer1.0-qt5",
            "binary_version": "1.14.5-0ubuntu1~18.04.3+esm2"
          },
          {
            "binary_name": "libgstreamer-plugins-good1.0-0",
            "binary_version": "1.14.5-0ubuntu1~18.04.3+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "gst-plugins-good1.0",
        "purl": "pkg:deb/ubuntu/gst-plugins-good1.0@1.14.5-0ubuntu1~18.04.3+esm2?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
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            },
            {
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          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.12.3-1ubuntu1",
        "1.12.4-1ubuntu1",
        "1.13.1-1ubuntu1",
        "1.13.91-1ubuntu1",
        "1.14.0-1ubuntu1",
        "1.14.1-1ubuntu1~ubuntu18.04.1",
        "1.14.4-1ubuntu1~ubuntu18.04.1",
        "1.14.5-0ubuntu1~18.04.1",
        "1.14.5-0ubuntu1~18.04.2",
        "1.14.5-0ubuntu1~18.04.3",
        "1.14.5-0ubuntu1~18.04.3+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "gstreamer1.0-gtk3",
            "binary_version": "1.16.3-0ubuntu1.3+esm2"
          },
          {
            "binary_name": "gstreamer1.0-plugins-good",
            "binary_version": "1.16.3-0ubuntu1.3+esm2"
          },
          {
            "binary_name": "gstreamer1.0-pulseaudio",
            "binary_version": "1.16.3-0ubuntu1.3+esm2"
          },
          {
            "binary_name": "gstreamer1.0-qt5",
            "binary_version": "1.16.3-0ubuntu1.3+esm2"
          },
          {
            "binary_name": "libgstreamer-plugins-good1.0-0",
            "binary_version": "1.16.3-0ubuntu1.3+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "gst-plugins-good1.0",
        "purl": "pkg:deb/ubuntu/gst-plugins-good1.0@1.16.3-0ubuntu1.3+esm2?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.16.3-0ubuntu1.3+esm2"
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          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.16.1-1ubuntu1",
        "1.16.2-1ubuntu1",
        "1.16.2-1ubuntu2",
        "1.16.2-1ubuntu2.1",
        "1.16.3-0ubuntu1",
        "1.16.3-0ubuntu1.1",
        "1.16.3-0ubuntu1.2",
        "1.16.3-0ubuntu1.3",
        "1.16.3-0ubuntu1.3+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gstreamer1.0-gtk3",
            "binary_version": "1.20.3-0ubuntu1.8"
          },
          {
            "binary_name": "gstreamer1.0-plugins-good",
            "binary_version": "1.20.3-0ubuntu1.8"
          },
          {
            "binary_name": "gstreamer1.0-pulseaudio",
            "binary_version": "1.20.3-0ubuntu1.8"
          },
          {
            "binary_name": "gstreamer1.0-qt5",
            "binary_version": "1.20.3-0ubuntu1.8"
          },
          {
            "binary_name": "libgstreamer-plugins-good1.0-0",
            "binary_version": "1.20.3-0ubuntu1.8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "gst-plugins-good1.0",
        "purl": "pkg:deb/ubuntu/gst-plugins-good1.0@1.20.3-0ubuntu1.8?arch=source\u0026distro=jammy"
      },
      "ranges": [
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          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.18.5-1ubuntu2",
        "1.18.5-1ubuntu3",
        "1.20.0-2ubuntu1",
        "1.20.1-1ubuntu1",
        "1.20.3-0ubuntu1",
        "1.20.3-0ubuntu1.1",
        "1.20.3-0ubuntu1.3",
        "1.20.3-0ubuntu1.4",
        "1.20.3-0ubuntu1.5",
        "1.20.3-0ubuntu1.6",
        "1.20.3-0ubuntu1.7"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gstreamer1.0-gtk3",
            "binary_version": "1.24.2-1ubuntu1.6"
          },
          {
            "binary_name": "gstreamer1.0-plugins-good",
            "binary_version": "1.24.2-1ubuntu1.6"
          },
          {
            "binary_name": "gstreamer1.0-pulseaudio",
            "binary_version": "1.24.2-1ubuntu1.6"
          },
          {
            "binary_name": "gstreamer1.0-qt5",
            "binary_version": "1.24.2-1ubuntu1.6"
          },
          {
            "binary_name": "gstreamer1.0-qt6",
            "binary_version": "1.24.2-1ubuntu1.6"
          },
          {
            "binary_name": "libgstreamer-plugins-good1.0-0",
            "binary_version": "1.24.2-1ubuntu1.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "gst-plugins-good1.0",
        "purl": "pkg:deb/ubuntu/gst-plugins-good1.0@1.24.2-1ubuntu1.6?arch=source\u0026distro=noble"
      },
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            }
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          "type": "ECOSYSTEM"
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      ],
      "versions": [
        "1.22.6-1ubuntu1",
        "1.22.6-1ubuntu2",
        "1.22.8-3ubuntu1",
        "1.22.9-1ubuntu1",
        "1.24.0-1ubuntu5",
        "1.24.0-1ubuntu7",
        "1.24.1-2ubuntu1",
        "1.24.2-1ubuntu1",
        "1.24.2-1ubuntu1.1",
        "1.24.2-1ubuntu1.2",
        "1.24.2-1ubuntu1.3",
        "1.24.2-1ubuntu1.4",
        "1.24.2-1ubuntu1.5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gstreamer1.0-gtk3",
            "binary_version": "1.28.2-2ubuntu0.2"
          },
          {
            "binary_name": "gstreamer1.0-plugins-good",
            "binary_version": "1.28.2-2ubuntu0.2"
          },
          {
            "binary_name": "gstreamer1.0-pulseaudio",
            "binary_version": "1.28.2-2ubuntu0.2"
          },
          {
            "binary_name": "gstreamer1.0-qt5",
            "binary_version": "1.28.2-2ubuntu0.2"
          },
          {
            "binary_name": "gstreamer1.0-qt6",
            "binary_version": "1.28.2-2ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "gst-plugins-good1.0",
        "purl": "pkg:deb/ubuntu/gst-plugins-good1.0@1.28.2-2ubuntu0.2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
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      "versions": [
        "1.26.5-1ubuntu2",
        "1.27.2-1ubuntu1",
        "1.27.90-1ubuntu1",
        "1.28.0-1ubuntu1",
        "1.28.0-1ubuntu3",
        "1.28.1-1ubuntu1",
        "1.28.2-2",
        "1.28.2-2ubuntu0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in the GStreamer gst-plugins-good package. The rtph264depay and rtph265depay RTP depayloader elements do not enforce a maximum size limit on the reassembly buffer used during fragmented RTP packet processing. A remote, unauthenticated attacker can send a continuous stream of RTP fragments without ever transmitting an end-of-fragment marker, causing the reassembly buffer to grow without bound until process memory is exhausted. This results in a denial of service through process termination.",
  "id": "UBUNTU-CVE-2026-18649",
  "modified": "2026-09-17T16:37:25Z",
  "published": "2026-08-06T08:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-18649"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-18649"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-18649"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2510614"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/113"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8778-1"
    }
  ],
  "related": [
    "USN-8778-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-18649"
  ]
}



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