CVE-2018-19757

There is a NULL pointer dereference at function sixel_helper_set_additional_message (status.c) in...

6.5 MediumFix available

CVE-2018-19757 is a medium vulnerability (CVSS 6.5) in Saitoha Libsixel, published November 30, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.86%, the 58th percentile. Fixed in libsixel 1.8.2-2.

There is a NULL pointer dereference at function sixel_helper_set_additional_message (status.c) in libsixel 1.8.2 that will cause a denial of service.

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

0.86%Up 0.3 points since Apr 14, 2021

What each source reports

NVD Score used 6.5

There is a NULL pointer dereference at function sixel_helper_set_additional_message (status.c) in libsixel 1.8.2 that will cause a denial of service.

Record: CVE-2018-19757
CVSS 3.0: 6.5 MediumCVSS:3.0/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-476
Updated: 2026-11-02

CVE List No score

There is a NULL pointer dereference at function sixel_helper_set_additional_message (status.c) in libsixel 1.8.2 that will cause a denial of service.

Record: CVE-2018-19757
Updated: 2026-11-02

EUVDEUVD-2018-11441 No score

There is a NULL pointer dereference at function sixel_helper_set_additional_message (status.c) in libsixel 1.8.2 that will cause a denial of service.

Record: EUVD-2018-11441
Updated: 2026-11-03

GitHub AdvisoriesGHSA-hw2x-pp4f-vg99 6.5

There is a NULL pointer dereference at function sixel_helper_set_additional_message (status.c) in...

There is a NULL pointer dereference at function sixel_helper_set_additional_message (status.c) in libsixel 1.8.2 that will cause a denial of service.

Record: GHSA-hw2x-pp4f-vg99
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-476
Updated: 2026-11-02

OSV 6.5

There is a NULL pointer dereference at function sixel_helper_set_additional_message (status.c) in libsixel 1.8.2 that will cause a denial of service.

Record: CVE-2018-19757
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2018-19757 6.5

There is a NULL pointer dereference at function sixel_helper_set_additional_message (status.c) in libsixel 1.8.2 that will cause a denial of service.

Record: DEBIAN-CVE-2018-19757
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2018-19757 6.5

There is a NULL pointer dereference at function sixel_helper_set_additional_message (status.c) in libsixel 1.8.2 that will cause a denial of service.

Record: UBUNTU-CVE-2018-19757
CVSS 3.0: 6.5 MediumCVSS:3.0/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 1.8.2-2	1.8.2-2
`libsixel` Debian:13	before 1.8.2-2	1.8.2-2
`libsixel` Debian:14	before 1.8.2-2	1.8.2-2
`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

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