CVE-2019-20024

A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel...

6.5 MediumFix available

CVE-2019-20024 is a medium vulnerability (CVSS 6.5) in Saitoha Libsixel, published December 27, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.99%, the 62nd percentile. Fixed in libsixel 1.8.6-1.

A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.99%Up 0.6 points since Apr 14, 2021

What each source reports

NVD Score used 6.5

A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4.

Record: CVE-2019-20024
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/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

A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4.

Record: CVE-2019-20024
Updated: 2026-11-02

EUVDEUVD-2019-10580 No score

A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4.

Record: EUVD-2019-10580
Updated: 2026-11-03

GitHub AdvisoriesGHSA-r283-3wm7-prjx 6.5

A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel...

A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4.

Record: GHSA-r283-3wm7-prjx
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-787
Updated: 2026-11-02

OSV 6.5

A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4.

Record: CVE-2019-20024
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2019-20024 6.5

A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4.

Record: DEBIAN-CVE-2019-20024
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2019-20024 6.5

A heap-based buffer overflow was discovered in image_buffer_resize in fromsixel.c in libsixel before 1.8.4.

Record: UBUNTU-CVE-2019-20024
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

saitoha libsixel

Affected packages

Affected packages
Package	Affected	Fixed
`libsixel` Debian:12	before 1.8.6-1	1.8.6-1
`libsixel` Debian:13	before 1.8.6-1	1.8.6-1
`libsixel` Debian:14	before 1.8.6-1	1.8.6-1
`libsixel` Ubuntu:16.04:LTS	All versions, plus listed versions 1.4.2-11.5.2-2	None known
`libsixel` Ubuntu:18.04:LTS	All versions, plus listed versions 1.5.2-21.7.3-1	None known
`libsixel` Ubuntu:20.04:LTS	All versions, plus listed versions 1.8.2-11.8.2-2.1	None known

History

History
When	Changed	Sources
2026-11-03	aliases	EUVD
2026-11-02	created	CVE List, GitHub Advisories, NVD, OSV

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

What each source reports

Affected products

Affected packages

History

References