[USN-7943-1] libcaca vulnerability

[noreply+usn-bot at canonical.com]

==========================================================================
Ubuntu Security Notice USN-7943-1
January 07, 2026

libcaca vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

libcaca could be made to crash if it opened a specially crafted file.

Software Description:
- libcaca: text mode graphics utilities

Details:

Han Zheng discovered that libcaca incorrectly handled certain images.
An attacker could possibly use this issue to cause libcaca to crash.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
  caca-utils                      0.99.beta20-5ubuntu0.25.10.1
  libcaca0                        0.99.beta20-5ubuntu0.25.10.1

Ubuntu 25.04
  caca-utils                      0.99.beta20-5ubuntu0.25.04.1
  libcaca0                        0.99.beta20-5ubuntu0.25.04.1

Ubuntu 24.04 LTS
  caca-utils                      0.99.beta20-4ubuntu0.1
  libcaca0                        0.99.beta20-4ubuntu0.1

Ubuntu 22.04 LTS
  caca-utils                      0.99.beta19-2.2ubuntu4.1
  libcaca0                        0.99.beta19-2.2ubuntu4.1

Ubuntu 20.04 LTS
  caca-utils                      0.99.beta19-2.1ubuntu1.20.04.2+esm1
                                  Available with Ubuntu Pro
  libcaca0                        0.99.beta19-2.1ubuntu1.20.04.2+esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  caca-utils                      0.99.beta19-2ubuntu0.18.04.3+esm1
                                  Available with Ubuntu Pro
  libcaca0                        0.99.beta19-2ubuntu0.18.04.3+esm1
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  caca-utils                      0.99.beta19-2ubuntu0.16.04.2+esm2
                                  Available with Ubuntu Pro
  libcaca0                        0.99.beta19-2ubuntu0.16.04.2+esm2
                                  Available with Ubuntu Pro

Ubuntu 14.04 LTS
  caca-utils                      0.99.beta18-1ubuntu5.1+esm3
                                  Available with Ubuntu Pro
  libcaca0                        0.99.beta18-1ubuntu5.1+esm3
                                  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-7943-1
  CVE-2022-0856

Package Information:
  https://launchpad.net/ubuntu/+source/libcaca/0.99.beta20-5ubuntu0.25.10.1
  https://launchpad.net/ubuntu/+source/libcaca/0.99.beta20-5ubuntu0.25.04.1
  https://launchpad.net/ubuntu/+source/libcaca/0.99.beta20-4ubuntu0.1
  https://launchpad.net/ubuntu/+source/libcaca/0.99.beta19-2.2ubuntu4.1
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