CVE-2018-20546

Name: CVE-2018-20546
Creator: NVD / NIST
Published: 2018-12-28T16:29:04.893+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 2.31%

Last modified Jun 17, 2026

CVE-2018-20546 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. There is an illegal READ memory access at caca/dither.c (function get_rgba_default) in libcaca 0.99.beta19 for the default bpp case.. EPSS estimates a 2.31% chance of exploitation in the next 30 days.

Description

There is an illegal READ memory access at caca/dither.c (function get_rgba_default) in libcaca 0.99.beta19 for the default bpp case.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

EPSS Probability

2.31%

81.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions	Update
Libcaca Project	Libcaca	0.99	Beta19
Canonical	Ubuntu Linux	12.04	—
Canonical	Ubuntu Linux	14.04	—
Canonical	Ubuntu Linux	16.04	—
Canonical	Ubuntu Linux	18.04	—
Canonical	Ubuntu Linux	18.10	—
Fedoraproject	Fedora	34	—
Fedoraproject	Fedora	35	—
Fedoraproject	Fedora	36	—
Debian	Debian Linux	8.0	—
Opensuse	Leap	15.0	—

References

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00033.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1652622Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/cacalabs/libcaca/commit/1022d97496c7899e8641515af363381b31ae2f05Patch, Third Party Advisory
https://github.com/cacalabs/libcaca/issues/38Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/01/msg00007.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WFGYICNTMNDNMDDUV4G2RYFB5HNJCOV/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PC7EGOEQ5C4OD66ZUJJIIYEXBTZOCMZX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZSBCRN6EGQJUVOSD4OEEQ6XORHEM2CUL/
https://usn.ubuntu.com/3860-1/Third Party Advisory
https://usn.ubuntu.com/3860-2/Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00033.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1652622Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/cacalabs/libcaca/commit/1022d97496c7899e8641515af363381b31ae2f05Patch, Third Party Advisory
https://github.com/cacalabs/libcaca/issues/38Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/01/msg00007.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WFGYICNTMNDNMDDUV4G2RYFB5HNJCOV/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PC7EGOEQ5C4OD66ZUJJIIYEXBTZOCMZX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZSBCRN6EGQJUVOSD4OEEQ6XORHEM2CUL/
https://usn.ubuntu.com/3860-1/Third Party Advisory
https://usn.ubuntu.com/3860-2/Third Party Advisory

Timeline

Published: Dec 28, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20546?

There is an illegal READ memory access at caca/dither.c (function get_rgba_default) in libcaca 0.99.beta19 for the default bpp case.

How severe is CVE-2018-20546?

CVE-2018-20546 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 2.31% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20546?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-20546?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST