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Ubuntu Security Notice USN-7904-1
December 03, 2025

ghostscript vulnerabilities
==========================================================================

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Ghostscript could be made to crash if it wrote certain files.

Software Description:
- ghostscript: PostScript and PDF interpreter

Details:

Piotr Kajda discovered that Ghostscript incorrectly handled writing certain
files. An attacker could possibly use this issue to cause Ghostscript to
crash, resulting in a denial of service.

Update instructions:

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

Ubuntu 20.04 LTS
  ghostscript                     9.50~dfsg-5ubuntu4.15+esm2
                                  Available with Ubuntu Pro
  libgs9                          9.50~dfsg-5ubuntu4.15+esm2
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  ghostscript                     9.26~dfsg+0-0ubuntu0.18.04.18+esm5
                                  Available with Ubuntu Pro
  libgs9                          9.26~dfsg+0-0ubuntu0.18.04.18+esm5
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  ghostscript                     9.26~dfsg+0-0ubuntu0.16.04.14+esm10
                                  Available with Ubuntu Pro
  libgs9                          9.26~dfsg+0-0ubuntu0.16.04.14+esm10
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-7904-1
  CVE-2025-59798, CVE-2025-59799

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