CVE catalog

CVE-2019-20020

libmatio affected and fixed versions

[CVE catalog]

A stack-based buffer over-read was discovered in ReadNextStructField in mat5.c in matio 1.5.17.

Severity: High · CVSS 7.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
Published: Dec 26, 2019, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.91% · Oct 27, 2026

Projects and upstream resources

[libmatio][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	libmatio	`1.5.19-2`	FixedDistribution-reported fixed boundary	[CVE-2019-20020]
Debiantrixie	libmatio	`1.5.28-2`	Fixed	[CVE-2019-20020]
Debiansid	libmatio	`1.5.19-2`	FixedDistribution-reported fixed boundary	[CVE-2019-20020]
Debiansid	libmatio	`1.6.0-2`	Fixed	[CVE-2019-20020]
Debianforky	libmatio	`1.5.19-2`	FixedDistribution-reported fixed boundary	[CVE-2019-20020]
Debianforky	libmatio	`1.6.0-2`	Fixed	[CVE-2019-20020]
Debianbookworm-security	libmatio	`1.5.23-2+deb12u1`	Fixed	[CVE-2019-20020]
Debianbookworm	libmatio	`1.5.19-2`	FixedDistribution-reported fixed boundary	[CVE-2019-20020]
Debianbookworm	libmatio	`1.5.23-2+deb12u1`	Fixed	[CVE-2019-20020]

Showing 9 fix observations. All 13 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Debianbookworm	libmatio	`1.5.19-2`	FixedDistribution-reported fixed boundary	[CVE-2019-20020]
Debianbookworm	libmatio	`1.5.23-2+deb12u1`	Fixed	[CVE-2019-20020]
Debianbookworm-security	libmatio	`1.5.23-2+deb12u1`	Fixed	[CVE-2019-20020]
Debianforky	libmatio	`1.5.19-2`	FixedDistribution-reported fixed boundary	[CVE-2019-20020]
Debianforky	libmatio	`1.6.0-2`	Fixed	[CVE-2019-20020]
Debiansid	libmatio	`1.5.19-2`	FixedDistribution-reported fixed boundary	[CVE-2019-20020]
Debiansid	libmatio	`1.6.0-2`	Fixed	[CVE-2019-20020]
Debiantrixie	libmatio	`1.5.19-2`	FixedDistribution-reported fixed boundary	[CVE-2019-20020]
Debiantrixie	libmatio	`1.5.28-2`	Fixed	[CVE-2019-20020]
Ubuntupro	libmatio	`1.5.13-3`	UnknownSource applicability is not established	[UBUNTU-CVE-2019-20020]Apr 22, 2026, 12:16:29 PM UTC
Ubuntupro	libmatio	`1.5.17-3`	UnknownSource applicability is not established	[UBUNTU-CVE-2019-20020]Apr 22, 2026, 12:16:29 PM UTC
Ubuntupro	libmatio	`1.5.17-3ubuntu0.1~esm1`	UnknownSource applicability is not established	[UBUNTU-CVE-2019-20020]Apr 22, 2026, 12:16:29 PM UTC
Ubuntupro	libmatio	`1.5.17-3ubuntu0.1~esm2`	UnknownSource applicability is not established	[UBUNTU-CVE-2019-20020]Apr 22, 2026, 12:16:29 PM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "libmatio",
      "status": "fixed",
      "release": "sid",
      "version": "1.6.0-2"
    },
    {
      "name": "libmatio",
      "status": "fixed",
      "release": "forky",
      "version": "1.6.0-2"
    },
    {
      "name": "libmatio",
      "status": "fixed",
      "release": "trixie",
      "version": "1.5.28-2"
    },
    {
      "name": "libmatio",
      "status": "fixed",
      "release": "bookworm",
      "version": "1.5.23-2+deb12u1"
    },
    {
      "name": "libmatio",
      "status": "fixed",
      "release": "bookworm-security",
      "version": "1.5.23-2+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "libmatio",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "1.5.19-2"
    },
    {
      "bug": null,
      "name": "libmatio",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "1.5.19-2"
    },
    {
      "bug": null,
      "name": "libmatio",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "1.5.19-2"
    },
    {
      "bug": null,
      "name": "libmatio",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "1.5.19-2"
    }
  ],
  "distribution_packages": [
    {
      "name": "libmatio",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "1.5.13-3",
        "1.5.17-3",
        "1.5.17-3ubuntu0.1~esm1",
        "1.5.17-3ubuntu0.1~esm2"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2019-20020",
      "fixed_version": "",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2019-20020",
      "provider_updated_at": "2026-04-22T12:16:29.380816Z",
      "applicability_unknown": true
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libmatio11]Unknown
Source package: [libmatio]
Details (4)
- 1.5.23-2+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
- 1.5.23-2+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
- 1.5.23-2+deb12u1 · amd64 · bookworm-security
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
- 1.5.23-2+deb12u1 · arm64 · bookworm-security
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
[libmatio-dev]Unknown
Source package: [libmatio]
Details (4)
- 1.5.23-2+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
- 1.5.23-2+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
- 1.5.23-2+deb12u1 · amd64 · bookworm-security
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
- 1.5.23-2+deb12u1 · arm64 · bookworm-security
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
[libmatio-doc]Unknown
Source package: [libmatio]
Details (4)
- 1.5.23-2+deb12u1 · all · bookworm
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
- 1.5.23-2+deb12u1 · all · bookworm
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
- 1.5.23-2+deb12u1 · all · bookworm-security
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
- 1.5.23-2+deb12u1 · all · bookworm-security
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
[matio-tools]Unknown
Source package: [libmatio]
Details (4)
- 1.5.23-2+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
- 1.5.23-2+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
- 1.5.23-2+deb12u1 · amd64 · bookworm-security
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12
- 1.5.23-2+deb12u1 · arm64 · bookworm-security
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · bookworm; dsa · libmatio · debian · 12

[Debian 13 (Trixie)]

[libmatio13]Unknown
Source package: [libmatio]
Details (2)
- 1.5.28-2 · amd64 · trixie
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · 13
- 1.5.28-2 · arm64 · trixie
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · 13
[libmatio-dev]Unknown
Source package: [libmatio]
Details (2)
- 1.5.28-2 · amd64 · trixie
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · 13
- 1.5.28-2 · arm64 · trixie
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · 13
[libmatio-doc]Unknown
Source package: [libmatio]
Details (2)
- 1.5.28-2 · all · trixie
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · 13
- 1.5.28-2 · all · trixie
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · 13
[matio-tools]Unknown
Source package: [libmatio]
Details (2)
- 1.5.28-2 · amd64 · trixie
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · 13
- 1.5.28-2 · arm64 · trixie
  Fixed · Fixed: 1.5.19-2
  dsa · libmatio · debian · 13

Observed: Oct 23, 2026, 5:43:39 PM UTC

References

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