CVE catalog

CVE-2018-20547

libcaca affected and fixed versions

There is an illegal READ memory access at caca/dither.c (function get_rgba_default) in libcaca 0.99.beta19 for 24bpp data.

Severity: Medium · CVSS 5.1CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Published: Dec 28, 2018, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.80% · Oct 27, 2026

Projects and upstream resources

[libcaca][Source-reported homepage]

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 / release	Package	Version	Status	Source
Debiantrixie	libcaca	`0.99.beta19-2.1`	FixedDistribution-reported fixed boundary	[CVE-2018-20547]
Debiantrixie	libcaca	`0.99.beta20-5+deb13u1`	Fixed	[CVE-2018-20547]
Debiansid	libcaca	`0.99.beta19-2.1`	FixedDistribution-reported fixed boundary	[CVE-2018-20547]
Debiansid	libcaca	`0.99.beta20-8`	Fixed	[CVE-2018-20547]
Debianforky	libcaca	`0.99.beta19-2.1`	FixedDistribution-reported fixed boundary	[CVE-2018-20547]
Debianforky	libcaca	`0.99.beta20-8`	Fixed	[CVE-2018-20547]
Debianbookworm	libcaca	`0.99.beta19-2.1`	FixedDistribution-reported fixed boundary	[CVE-2018-20547]
Debianbookworm	libcaca	`0.99.beta20-3+deb12u1`	Fixed	[CVE-2018-20547]

Showing 8 fix observations. All 20 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
UnknownRelease not reported	libcaca	`0.99.beta19-2.1`	UnknownSource applicability is not established	Provider not reported
Debianbookworm	libcaca	`0.99.beta19-2.1`	FixedDistribution-reported fixed boundary	[CVE-2018-20547]
Debianbookworm	libcaca	`0.99.beta20-3+deb12u1`	Fixed	[CVE-2018-20547]
Debianforky	libcaca	`0.99.beta19-2.1`	FixedDistribution-reported fixed boundary	[CVE-2018-20547]
Debianforky	libcaca	`0.99.beta20-8`	Fixed	[CVE-2018-20547]
Debiansid	libcaca	`0.99.beta19-2.1`	FixedDistribution-reported fixed boundary	[CVE-2018-20547]
Debiansid	libcaca	`0.99.beta20-8`	Fixed	[CVE-2018-20547]
Debiantrixie	libcaca	`0.99.beta19-2.1`	FixedDistribution-reported fixed boundary	[CVE-2018-20547]
Debiantrixie	libcaca	`0.99.beta20-5+deb13u1`	Fixed	[CVE-2018-20547]
Ubuntu14.04	libcaca	`0.99.beta18-1ubuntu2`	UnknownSource applicability is not established	[UBUNTU-CVE-2018-20547]Apr 22, 2026, 11:52:09 AM UTC
Ubuntu14.04	libcaca	`0.99.beta18-1ubuntu3`	UnknownSource applicability is not established	[UBUNTU-CVE-2018-20547]Apr 22, 2026, 11:52:09 AM UTC
Ubuntu14.04	libcaca	`0.99.beta18-1ubuntu4`	UnknownSource applicability is not established	[UBUNTU-CVE-2018-20547]Apr 22, 2026, 11:52:09 AM UTC
Ubuntu14.04	libcaca	`0.99.beta18-1ubuntu5`	UnknownSource applicability is not established	[UBUNTU-CVE-2018-20547]Apr 22, 2026, 11:52:09 AM UTC
Ubuntu14.04	libcaca	`0.99.beta18-1ubuntu5.1`	UnknownSource applicability is not established	[UBUNTU-CVE-2018-20547]Apr 22, 2026, 11:52:09 AM UTC
Ubuntu16.04	libcaca	`0.99.beta19-2build2~gcc5.1`	UnknownSource applicability is not established	[UBUNTU-CVE-2018-20547]Apr 22, 2026, 11:52:09 AM UTC
Ubuntu16.04	libcaca	`0.99.beta19-2build2~gcc5.2`	UnknownSource applicability is not established	[UBUNTU-CVE-2018-20547]Apr 22, 2026, 11:52:09 AM UTC
Ubuntu16.04	libcaca	`0.99.beta19-2ubuntu0.16.04.1`	UnknownSource applicability is not established	[UBUNTU-CVE-2018-20547]Apr 22, 2026, 11:52:09 AM UTC
Ubuntu18.04	libcaca	`0.99.beta19-2build2~gcc5.2`	UnknownSource applicability is not established	[UBUNTU-CVE-2018-20547]Apr 22, 2026, 11:52:09 AM UTC
Ubuntu18.04	libcaca	`0.99.beta19-2build2~gcc5.3`	UnknownSource applicability is not established	[UBUNTU-CVE-2018-20547]Apr 22, 2026, 11:52:09 AM UTC
Ubuntu18.04	libcaca	`0.99.beta19-2ubuntu0.18.04.1`	UnknownSource applicability is not established	[UBUNTU-CVE-2018-20547]Apr 22, 2026, 11:52:09 AM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "libcaca",
      "status": "fixed",
      "release": "sid",
      "version": "0.99.beta20-8"
    },
    {
      "name": "libcaca",
      "status": "fixed",
      "release": "forky",
      "version": "0.99.beta20-8"
    },
    {
      "name": "libcaca",
      "status": "fixed",
      "release": "trixie",
      "version": "0.99.beta20-5+deb13u1"
    },
    {
      "name": "libcaca",
      "status": "fixed",
      "release": "bookworm",
      "version": "0.99.beta20-3+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 917807,
      "name": "libcaca",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "low",
      "fixed_version": "0.99.beta19-2.1"
    },
    {
      "bug": 917807,
      "name": "libcaca",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "low",
      "fixed_version": "0.99.beta19-2.1"
    },
    {
      "bug": 917807,
      "name": "libcaca",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "low",
      "fixed_version": "0.99.beta19-2.1"
    },
    {
      "bug": 917807,
      "name": "libcaca",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "low",
      "fixed_version": "0.99.beta19-2.1"
    }
  ],
  "distribution_packages": [
    {
      "name": "libcaca",
      "fixed_version": "0.99.beta19-2.1",
      "applicability_unknown": true
    },
    {
      "name": "libcaca",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.99.beta18-1ubuntu5.1"
            }
          ]
        }
      ],
      "release": "14.04",
      "versions": [
        "0.99.beta18-1ubuntu2",
        "0.99.beta18-1ubuntu3",
        "0.99.beta18-1ubuntu4",
        "0.99.beta18-1ubuntu5"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2018-20547",
      "fixed_version": "0.99.beta18-1ubuntu5.1",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2018-20547",
      "provider_updated_at": "2026-04-22T11:52:09.818452Z",
      "applicability_unknown": true
    },
    {
      "name": "libcaca",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.99.beta19-2ubuntu0.16.04.1"
            }
          ]
        }
      ],
      "release": "16.04",
      "versions": [
        "0.99.beta19-2build2~gcc5.1",
        "0.99.beta19-2build2~gcc5.2"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2018-20547",
      "fixed_version": "0.99.beta19-2ubuntu0.16.04.1",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2018-20547",
      "provider_updated_at": "2026-04-22T11:52:09.818452Z",
      "applicability_unknown": true
    },
    {
      "name": "libcaca",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.99.beta19-2ubuntu0.18.04.1"
            }
          ]
        }
      ],
      "release": "18.04",
      "versions": [
        "0.99.beta19-2build2~gcc5.2",
        "0.99.beta19-2build2~gcc5.3"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2018-20547",
      "fixed_version": "0.99.beta19-2ubuntu0.18.04.1",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2018-20547",
      "provider_updated_at": "2026-04-22T11:52:09.818452Z",
      "applicability_unknown": true
    }
  ]
}

[Debian bug #917807]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[caca-utils]Unknown
Source package: [libcaca]
Details (2)
- 0.99.beta20-3+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 0.99.beta19-2.1
  dsa · libcaca · debian · bookworm; dsa · libcaca · debian · 12
- 0.99.beta20-3+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 0.99.beta19-2.1
  dsa · libcaca · debian · bookworm; dsa · libcaca · debian · 12
[libcaca0]Unknown
Source package: [libcaca]
Details (2)
- 0.99.beta20-3+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 0.99.beta19-2.1
  dsa · libcaca · debian · bookworm; dsa · libcaca · debian · 12
- 0.99.beta20-3+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 0.99.beta19-2.1
  dsa · libcaca · debian · bookworm; dsa · libcaca · debian · 12
[libcaca-dev]Unknown
Source package: [libcaca]
Details (2)
- 0.99.beta20-3+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 0.99.beta19-2.1
  dsa · libcaca · debian · bookworm; dsa · libcaca · debian · 12
- 0.99.beta20-3+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 0.99.beta19-2.1
  dsa · libcaca · debian · bookworm; dsa · libcaca · debian · 12

[Debian 13 (Trixie)]

[caca-utils]Unknown
Source package: [libcaca]
Details (2)
- 0.99.beta20-5+deb13u1 · amd64 · trixie
  Fixed · Fixed: 0.99.beta19-2.1
  dsa · libcaca · debian · 13
- 0.99.beta20-5+deb13u1 · arm64 · trixie
  Fixed · Fixed: 0.99.beta19-2.1
  dsa · libcaca · debian · 13
[libcaca0]Unknown
Source package: [libcaca]
Details (2)
- 0.99.beta20-5+deb13u1 · amd64 · trixie
  Fixed · Fixed: 0.99.beta19-2.1
  dsa · libcaca · debian · 13
- 0.99.beta20-5+deb13u1 · arm64 · trixie
  Fixed · Fixed: 0.99.beta19-2.1
  dsa · libcaca · debian · 13
[libcaca-dev]Unknown
Source package: [libcaca]
Details (2)
- 0.99.beta20-5+deb13u1 · amd64 · trixie
  Fixed · Fixed: 0.99.beta19-2.1
  dsa · libcaca · debian · 13
- 0.99.beta20-5+deb13u1 · arm64 · trixie
  Fixed · Fixed: 0.99.beta19-2.1
  dsa · libcaca · debian · 13

Observed: Oct 23, 2026, 5:36:04 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]