CVE-2019-20023
A memory leak was discovered in image_buffer_resize in fromsixel.c in libsixel 1.8.4.
A memory leak was discovered in image_buffer_resize in fromsixel.c in libsixel 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
What each source reports
NVD Score used
A memory leak was discovered in image_buffer_resize in fromsixel.c in libsixel 1.8.4.
- Record
CVE-2019-20023- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:N/A:P - Weakness
- CWE-401
- Updated
- 2026-11-02
CVE List No score
A memory leak was discovered in image_buffer_resize in fromsixel.c in libsixel 1.8.4.
- Record
CVE-2019-20023- Updated
- 2026-11-02
EUVDEUVD-2019-10579 No score
A memory leak was discovered in image_buffer_resize in fromsixel.c in libsixel 1.8.4.
- Record
EUVD-2019-10579- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-273r-q5cp-p9c2
A memory leak was discovered in image_buffer_resize in fromsixel.c in libsixel 1.8.4.
A memory leak was discovered in image_buffer_resize in fromsixel.c in libsixel 1.8.4.
- Record
GHSA-273r-q5cp-p9c2- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-401, CWE-772
- Updated
- 2026-11-02
OSV
A memory leak was discovered in image_buffer_resize in fromsixel.c in libsixel 1.8.4.
- Record
CVE-2019-20023- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2019-20023
A memory leak was discovered in image_buffer_resize in fromsixel.c in libsixel 1.8.4.
- Record
DEBIAN-CVE-2019-20023- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2019-20023
A memory leak was discovered in image_buffer_resize in fromsixel.c in libsixel 1.8.4.
- Record
UBUNTU-CVE-2019-20023- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libsixelDebian:12 |
before 1.8.6-1 | 1.8.6-1 |
libsixelDebian:13 |
before 1.8.6-1 | 1.8.6-1 |
libsixelDebian:14 |
before 1.8.6-1 | 1.8.6-1 |
libsixelUbuntu:16.04:LTS |
All versions, plus listed versions 1.4.2-11.5.2-2 |
None known |
libsixelUbuntu:18.04:LTS |
All versions, plus listed versions 1.5.2-21.7.3-1 |
None known |
libsixelUbuntu:20.04:LTS |
All versions, plus listed versions 1.8.2-11.8.2-2.1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-20023 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.