ubuntu-cve-2026-42046
Vulnerability from osv_ubuntu
Published
2026-05-11 22:22
Modified
2026-05-27 13:58
Summary
Details

libcaca is a colour ASCII art library. In 0.99.beta20 and earlier, an integer overflow vulnerability in libcaca's canvas import functionality allows an attacker to cause a controlled heap out-of-bounds write (heap overflow) by supplying a crafted file in the "caca" format. Depending on the build configuration and memory allocator, this may lead to memory corruption or remote code execution. This is the same vulnerability as CVE-2021-3410 but the fix at that time was not fully correct. Commit fb77acff9ba6bb01d53940da34fb10f20b156a23 fixes this vulnerability.

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

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "caca-utils",
            "binary_version": "0.99.beta18-1ubuntu5.1+esm3"
          },
          {
            "binary_name": "libcaca0",
            "binary_version": "0.99.beta18-1ubuntu5.1+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "libcaca",
        "purl": "pkg:deb/ubuntu/libcaca@0.99.beta18-1ubuntu5.1+esm3?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.99.beta18-1ubuntu2",
        "0.99.beta18-1ubuntu3",
        "0.99.beta18-1ubuntu4",
        "0.99.beta18-1ubuntu5",
        "0.99.beta18-1ubuntu5.1",
        "0.99.beta18-1ubuntu5.1+esm1",
        "0.99.beta18-1ubuntu5.1+esm2",
        "0.99.beta18-1ubuntu5.1+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "caca-utils",
            "binary_version": "0.99.beta19-2ubuntu0.16.04.2+esm2"
          },
          {
            "binary_name": "libcaca0",
            "binary_version": "0.99.beta19-2ubuntu0.16.04.2+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "libcaca",
        "purl": "pkg:deb/ubuntu/libcaca@0.99.beta19-2ubuntu0.16.04.2+esm2?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.99.beta19-2build2~gcc5.1",
        "0.99.beta19-2build2~gcc5.2",
        "0.99.beta19-2ubuntu0.16.04.1",
        "0.99.beta19-2ubuntu0.16.04.2",
        "0.99.beta19-2ubuntu0.16.04.2+esm1",
        "0.99.beta19-2ubuntu0.16.04.2+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "caca-utils",
            "binary_version": "0.99.beta19-2ubuntu0.18.04.3+esm1"
          },
          {
            "binary_name": "libcaca0",
            "binary_version": "0.99.beta19-2ubuntu0.18.04.3+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "libcaca",
        "purl": "pkg:deb/ubuntu/libcaca@0.99.beta19-2ubuntu0.18.04.3+esm1?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.99.beta19-2build2~gcc5.2",
        "0.99.beta19-2build2~gcc5.3",
        "0.99.beta19-2ubuntu0.18.04.1",
        "0.99.beta19-2ubuntu0.18.04.2",
        "0.99.beta19-2ubuntu0.18.04.3",
        "0.99.beta19-2ubuntu0.18.04.3+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "caca-utils",
            "binary_version": "0.99.beta19-2.1ubuntu1.20.04.2+esm1"
          },
          {
            "binary_name": "libcaca0",
            "binary_version": "0.99.beta19-2.1ubuntu1.20.04.2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "libcaca",
        "purl": "pkg:deb/ubuntu/libcaca@0.99.beta19-2.1ubuntu1.20.04.2+esm1?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.99.beta19-2.1",
        "0.99.beta19-2.1ubuntu1",
        "0.99.beta19-2.1ubuntu1.20.04.1",
        "0.99.beta19-2.1ubuntu1.20.04.2",
        "0.99.beta19-2.1ubuntu1.20.04.2+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "caca-utils",
            "binary_version": "0.99.beta19-2.2ubuntu4.2"
          },
          {
            "binary_name": "libcaca0",
            "binary_version": "0.99.beta19-2.2ubuntu4.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libcaca",
        "purl": "pkg:deb/ubuntu/libcaca@0.99.beta19-2.2ubuntu4.2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.99.beta19-2.2ubuntu4.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.99.beta19-2.2ubuntu2",
        "0.99.beta19-2.2ubuntu3",
        "0.99.beta19-2.2ubuntu4",
        "0.99.beta19-2.2ubuntu4.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "caca-utils",
            "binary_version": "0.99.beta20-4ubuntu0.2"
          },
          {
            "binary_name": "libcaca0",
            "binary_version": "0.99.beta20-4ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libcaca",
        "purl": "pkg:deb/ubuntu/libcaca@0.99.beta20-4ubuntu0.2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.99.beta20-4ubuntu0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.99.beta20-3build1",
        "0.99.beta20-4",
        "0.99.beta20-4build1",
        "0.99.beta20-4build2",
        "0.99.beta20-4ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "caca-utils",
            "binary_version": "0.99.beta20-5ubuntu0.25.10.2"
          },
          {
            "binary_name": "libcaca0",
            "binary_version": "0.99.beta20-5ubuntu0.25.10.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libcaca",
        "purl": "pkg:deb/ubuntu/libcaca@0.99.beta20-5ubuntu0.25.10.2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.99.beta20-5ubuntu0.25.10.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.99.beta20-5",
        "0.99.beta20-5ubuntu0.25.10.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "caca-utils",
            "binary_version": "0.99.beta20-6ubuntu2.1"
          },
          {
            "binary_name": "libcaca0",
            "binary_version": "0.99.beta20-6ubuntu2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libcaca",
        "purl": "pkg:deb/ubuntu/libcaca@0.99.beta20-6ubuntu2.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.99.beta20-6ubuntu2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.99.beta20-5",
        "0.99.beta20-6",
        "0.99.beta20-6ubuntu1",
        "0.99.beta20-6ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "libcaca is a colour ASCII art library. In 0.99.beta20 and earlier, an integer overflow vulnerability in libcaca\u0027s canvas import functionality allows an attacker to cause a controlled heap out-of-bounds write (heap overflow) by supplying a crafted file in the \"caca\" format. Depending on the build configuration and memory allocator, this may lead to memory corruption or remote code execution. This is the same vulnerability as CVE-2021-3410 but the fix at that time was not fully correct. Commit fb77acff9ba6bb01d53940da34fb10f20b156a23 fixes this vulnerability.",
  "id": "UBUNTU-CVE-2026-42046",
  "modified": "2026-05-27T13:58:01Z",
  "published": "2026-05-11T22:22:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-42046"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-42046"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/cacalabs/libcaca/security/advisories/GHSA-4vvg-vrqv-m56w"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8318-1"
    }
  ],
  "related": [
    "USN-8318-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-42046"
  ]
}



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