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ubuntu-cve-2026-56208
Vulnerability from osv_ubuntu
Published
2026-06-19 17:16
Modified
2026-09-16 17:25
Summary
Details

A heap buffer overflow vulnerability was found in libaom, the reference AV1 codec implementation. A flaw in the AV1 encoder's Look-Ahead Processing (LAP) mode causes the first-pass stats ring buffer wrap-around guard to be bypassed when g_lag_in_frames is set to 1 or higher. This results in a 232-byte out-of-bounds write on every encoded frame after the second, corrupting adjacent heap objects. An attacker who can influence encoder configuration in a transcoding service or WebRTC session could exploit this to cause a denial of service (process crash) or potentially achieve code execution.

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

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "aom-tools",
            "binary_version": "3.3.0-1ubuntu0.1+esm1"
          },
          {
            "binary_name": "libaom3",
            "binary_version": "3.3.0-1ubuntu0.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "aom",
        "purl": "pkg:deb/ubuntu/aom@3.3.0-1ubuntu0.1+esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.3.0-1ubuntu0.1+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0.errata1-3build1",
        "3.2.0-2",
        "3.3.0-1",
        "3.3.0-1ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "aom-tools",
            "binary_version": "3.8.2-2ubuntu0.2"
          },
          {
            "binary_name": "libaom3",
            "binary_version": "3.8.2-2ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "aom",
        "purl": "pkg:deb/ubuntu/aom@3.8.2-2ubuntu0.2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.8.2-2ubuntu0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.6.1-1",
        "3.7.0-1",
        "3.7.1-1",
        "3.8.1-1",
        "3.8.2-2build1",
        "3.8.2-2ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "aom-tools",
            "binary_version": "3.12.1-1"
          },
          {
            "binary_name": "libaom3",
            "binary_version": "3.12.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "aom",
        "purl": "pkg:deb/ubuntu/aom@3.12.1-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.12.0-1",
        "3.12.1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "aom-tools",
            "binary_version": "3.13.1-2ubuntu0.1"
          },
          {
            "binary_name": "libaom3",
            "binary_version": "3.13.1-2ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "aom",
        "purl": "pkg:deb/ubuntu/aom@3.13.1-2ubuntu0.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.13.1-2ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.12.1-1",
        "3.13.1-2"
      ]
    }
  ],
  "aliases": [],
  "details": "A heap buffer overflow vulnerability was found in libaom, the reference AV1 codec implementation. A flaw in the AV1 encoder\u0027s Look-Ahead Processing (LAP) mode causes the first-pass stats ring buffer wrap-around guard to be bypassed when g_lag_in_frames is set to 1 or higher. This results in a 232-byte out-of-bounds write on every encoded frame after the second, corrupting adjacent heap objects. An attacker who can influence encoder configuration in a transcoding service or WebRTC session could exploit this to cause a denial of service (process crash) or potentially achieve code execution.",
  "id": "UBUNTU-CVE-2026-56208",
  "modified": "2026-09-16T17:25:13Z",
  "published": "2026-06-19T17:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-56208"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-56208"
    },
    {
      "type": "REPORT",
      "url": "https://aomedia.googlesource.com/aom/+/243f8ae84bfbc495b3a3c12948abc4dff3af2f84"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2490799"
    },
    {
      "type": "REPORT",
      "url": "https://issues.chromium.org/issues/504317456"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8772-1"
    }
  ],
  "related": [
    "USN-8772-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-56208"
  ]
}



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