CVE catalog

CVE-2019-20805

UBUNTU-

[CVE catalog]

p_lx_elf.cpp in UPX before 3.96 has an integer overflow during unpacking via crafted values in a PT_DYNAMIC segment.

Severity
Medium · CVSS 5.3CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Published
Updated
Source
[NVD] · [CVE record]
EPSS
0.82% · Oct 27, 2026

Projects and upstream resources

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
Ubuntu20.04upx-ucl3.95-2UnknownSource applicability is not established[UBUNTU-CVE-2019-20805]
Ubuntu20.04upx-ucl3.95-2build1UnknownSource applicability is not established[UBUNTU-CVE-2019-20805]
Ubuntu18.04upx-ucl3.94-2UnknownSource applicability is not established[UBUNTU-CVE-2019-20805]
Ubuntu18.04upx-ucl3.94-3UnknownSource applicability is not established[UBUNTU-CVE-2019-20805]
Ubuntu18.04upx-ucl3.94-4UnknownSource applicability is not established[UBUNTU-CVE-2019-20805]
Ubuntu16.04upx-ucl3.91-1UnknownSource applicability is not established[UBUNTU-CVE-2019-20805]
Debian14upx-ucl3.96-1UnknownSource applicability is not established[DEBIAN-CVE-2019-20805]
Debian13upx-ucl3.96-1UnknownSource applicability is not established[DEBIAN-CVE-2019-20805]
Provider details and historical evidence
Distribution / releasePackageVersionStatusSource
Debian13upx-ucl3.96-1UnknownSource applicability is not established[DEBIAN-CVE-2019-20805]
Debian14upx-ucl3.96-1UnknownSource applicability is not established[DEBIAN-CVE-2019-20805]
Ubuntu16.04upx-ucl3.91-1UnknownSource applicability is not established[UBUNTU-CVE-2019-20805]
Ubuntu18.04upx-ucl3.94-2UnknownSource applicability is not established[UBUNTU-CVE-2019-20805]
Ubuntu18.04upx-ucl3.94-3UnknownSource applicability is not established[UBUNTU-CVE-2019-20805]
Ubuntu18.04upx-ucl3.94-4UnknownSource applicability is not established[UBUNTU-CVE-2019-20805]
Ubuntu20.04upx-ucl3.95-2UnknownSource applicability is not established[UBUNTU-CVE-2019-20805]
Ubuntu20.04upx-ucl3.95-2build1UnknownSource applicability is not established[UBUNTU-CVE-2019-20805]
Original provider fields
{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "upx-ucl",
      "distro": "debian",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.96-1"
            }
          ]
        }
      ],
      "release": "13",
      "versions": [],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/DEBIAN-CVE-2019-20805",
      "fixed_version": "3.96-1",
      "provider_source": "pypi",
      "provider_record_id": "DEBIAN-CVE-2019-20805",
      "provider_updated_at": "2026-09-21T07:03:17.660776010Z",
      "applicability_unknown": true
    },
    {
      "name": "upx-ucl",
      "distro": "debian",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.96-1"
            }
          ]
        }
      ],
      "release": "14",
      "versions": [],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/DEBIAN-CVE-2019-20805",
      "fixed_version": "3.96-1",
      "provider_source": "pypi",
      "provider_record_id": "DEBIAN-CVE-2019-20805",
      "provider_updated_at": "2026-09-21T07:03:17.660776010Z",
      "applicability_unknown": true
    },
    {
      "name": "upx-ucl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "16.04",
      "versions": [
        "3.91-1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2019-20805",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2019-20805",
      "provider_updated_at": "2025-10-24T04:48:09Z",
      "applicability_unknown": true
    },
    {
      "name": "upx-ucl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "18.04",
      "versions": [
        "3.94-2",
        "3.94-3",
        "3.94-4"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2019-20805",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2019-20805",
      "provider_updated_at": "2025-10-24T04:48:09Z",
      "applicability_unknown": true
    },
    {
      "name": "upx-ucl",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "3.95-2",
        "3.95-2build1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2019-20805",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2019-20805",
      "provider_updated_at": "2025-10-24T04:48:09Z",
      "applicability_unknown": true
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 13 (Trixie)]

  • [upx-ucl]Unknown
    Details (2)

    • 4.2.4-1.1 · amd64 · trixie

      Fixed · Fixed: 3.96-1

      pypi · upx-ucl · debian · 13

    • 4.2.4-1.1 · arm64 · trixie

      Fixed · Fixed: 3.96-1

      pypi · upx-ucl · debian · 13

Observed:

References

[FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]