CVE-2020-19609

Artifex MuPDF before 1.18.0 has a heap based buffer over-write in tiff_expand_colormap() function...

5.5 MediumFix available

Artifex MuPDF before 1.18.0 has a heap based buffer over-write in tiff_expand_colormap() function when parsing TIFF files allowing attackers to cause a denial of service.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

1.05%Unchanged since Jul 22, 2021

What each source reports

NVD Score used 5.5

Artifex MuPDF before 1.18.0 has a heap based buffer over-write in tiff_expand_colormap() function when parsing TIFF files allowing attackers to cause a denial of service.

Record: CVE-2020-19609
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness: CWE-787
Updated: 2026-11-02

CVE List No score

Artifex MuPDF before 1.18.0 has a heap based buffer over-write in tiff_expand_colormap() function when parsing TIFF files allowing attackers to cause a denial of service.

Record: CVE-2020-19609
Updated: 2026-11-02

EUVDEUVD-2020-11513 No score

Artifex MuPDF before 1.18.0 has a heap based buffer over-write in tiff_expand_colormap() function when parsing TIFF files allowing attackers to cause a denial of service.

Record: EUVD-2020-11513
Updated: 2026-11-03

GitHub AdvisoriesGHSA-r2v7-h6q9-p4m3 No score

Artifex MuPDF before 1.18.0 has a heap based buffer over-write in tiff_expand_colormap() function...

Artifex MuPDF before 1.18.0 has a heap based buffer over-write in tiff_expand_colormap() function when parsing TIFF files allowing attackers to cause a denial of service.

Record: GHSA-r2v7-h6q9-p4m3
Weakness: CWE-787
Updated: 2026-11-02

OSV 5.5

Artifex MuPDF before 1.18.0 has a heap based buffer over-write in tiff_expand_colormap() function when parsing TIFF files allowing attackers to cause a denial of service.

Record: CVE-2020-19609
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2020-19609 5.5

Artifex MuPDF before 1.18.0 has a heap based buffer over-write in tiff_expand_colormap() function when parsing TIFF files allowing attackers to cause a denial of service.

Record: DEBIAN-CVE-2020-19609
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-19609 5.5

Artifex MuPDF before 1.18.0 has a heap based buffer over-write in tiff_expand_colormap() function when parsing TIFF files allowing attackers to cause a denial of service.

Record: UBUNTU-CVE-2020-19609
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVopenSUSE-SU-2021:1341-1 No score

Security update for mupdf

This update for mupdf fixes the following issues:

CVE-2020-19609: Fixed heap-based buffer overflow in tiff_expand_colormap() when parsing TIFF files (boo#1190176)
CVE-2020-16600: Fixed use-after-free when a valid page was followed by a page with invalid pixmap dimensions (boo#1190175)

Record: openSUSE-SU-2021:1341-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`mupdf` Debian:12	before 1.17.0+ds1-2	1.17.0+ds1-2
`mupdf` Debian:13	before 1.17.0+ds1-2	1.17.0+ds1-2
`mupdf` Debian:14	before 1.17.0+ds1-2	1.17.0+ds1-2
`mupdf` Debian:9 From an advisory covering 6 CVEs	before 1.14.0+ds1-4+deb9u1, plus listed versions 1.11+ds1-11.11+ds1-1.11.11+ds1-21.12.0+ds1-11.13.0+ds1-1 Show 14 moreShow less 1.13.0+ds1-21.13.0+ds1-31.14.0+ds1-11.14.0+ds1-21.14.0+ds1-31.14.0+ds1-41.9a+ds1-41.9a+ds1-4+deb9u11.9a+ds1-4+deb9u21.9a+ds1-4+deb9u31.9a+ds1-4+deb9u41.9a+ds1-4+deb9u51.9a+ds1-4+deb9u61.9a+ds1-4+deb9u7	1.14.0+ds1-4+deb9u1
`mupdf` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 1.7-11.7a-11.7a-1ubuntu0.1~esm1	None known
`mupdf` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 1.11+ds1-1.11.11+ds1-21.12.0+ds1-11.12.0+ds1-1ubuntu0.1~esm11.12.0+ds1-1ubuntu0.1~esm2	None known
`mupdf` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 1.15.0+ds1-11.16.1+ds1-1ubuntu11.16.1+ds1-1ubuntu1+esm11.16.1+ds1-1ubuntu1+esm2	None known
`mupdf` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 1.17.0+ds1-21.19.0+ds1-11.19.0+ds1-1build11.19.0+ds1-21.19.0+ds1-2ubuntu0.1~esm1	None known
`mupdf` SUSE:Package Hub 15 SP1 From an advisory covering 2 CVEs	before 1.12.0-bp153.2.3.1	1.12.0-bp153.2.3.1
`mupdf` SUSE:Package Hub 15 SP2 From an advisory covering 2 CVEs	before 1.12.0-bp153.2.3.1	1.12.0-bp153.2.3.1
`mupdf` SUSE:Package Hub 15 SP3 From an advisory covering 2 CVEs	before 1.12.0-bp153.2.3.1	1.12.0-bp153.2.3.1
`mupdf` openSUSE:Leap 15.2 From an advisory covering 2 CVEs	before 1.12.0-bp153.2.3.1	1.12.0-bp153.2.3.1
`mupdf` openSUSE:Leap 15.3 From an advisory covering 2 CVEs	before 1.12.0-bp153.2.3.1	1.12.0-bp153.2.3.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-19609 is a medium vulnerability (CVSS 5.5) in Artifex Mupdf, published July 21, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.05%, the 64th percentile. Fixed in mupdf 1.17.0+ds1-2.

References

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