CVE catalog

CVE-2021-21837

UBUNTU-

[CVE catalog]

Multiple exploitable integer overflow vulnerabilities exist within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. A specially crafted MPEG-4 input can cause an integer overflow due to unchecked arithmetic resulting in a heap-based buffer overflow that causes memory corruption. An attacker can convince a user to open a video to trigger this vulnerability.

Severity
Unknown
Published
Updated
Source
[NVD] · [CVE record]
EPSS
2.01% · Oct 27, 2026

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / releasePackageVersionStatusSource
Debian11gpac1.0.1+dfsg1-4+deb11u1Fixed[DEBIAN-CVE-2021-21837]

Showing 1 fix observations. All 7 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence
Distribution / releasePackageVersionStatusSource
Debian11gpac1.0.1+dfsg1-4Affected[DEBIAN-CVE-2021-21837]
Debian11gpac1.0.1+dfsg1-4+deb11u1Fixed[DEBIAN-CVE-2021-21837]
Ubuntuprogpac2.2.1+dfsg1-3Affected[UBUNTU-CVE-2021-21837]
Ubuntuprogpac2.2.1+dfsg1-3.1Affected[UBUNTU-CVE-2021-21837]
Ubuntuprogpac2.2.1+dfsg1-3.1build1Affected[UBUNTU-CVE-2021-21837]
Ubuntuprogpac2.2.1+dfsg1-3.1build2Affected[UBUNTU-CVE-2021-21837]
Ubuntuprogpac2.2.1+dfsg1-3.1ubuntu0.1~esm2Affected[UBUNTU-CVE-2021-21837]
Original provider fields
{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "gpac",
      "distro": "debian",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.1+dfsg1-4+deb11u1"
            }
          ]
        }
      ],
      "release": "11",
      "versions": [
        "1.0.1+dfsg1-4"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/DEBIAN-CVE-2021-21837",
      "fixed_version": "1.0.1+dfsg1-4+deb11u1",
      "provider_source": "pypi",
      "provider_record_id": "DEBIAN-CVE-2021-21837",
      "provider_updated_at": "2026-08-27T23:03:58.779189888Z"
    },
    {
      "name": "gpac",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "2.2.1+dfsg1-3",
        "2.2.1+dfsg1-3.1",
        "2.2.1+dfsg1-3.1build1",
        "2.2.1+dfsg1-3.1build2",
        "2.2.1+dfsg1-3.1ubuntu0.1~esm2"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-21837",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-21837",
      "provider_updated_at": "2026-04-22T12:47:45.727688Z"
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

Observed:

References

[FIRST EPSS] · [OSV Package Vulnerability Database]