Fedora 42 CUPS Important Vulnerability Risks 2026-34454fdb74
fedora
April 22, 2026
2.4.17 - security fixes for CVE-2026-39316, CVE-2026-39314, CVE-2026-34979, CVE-2026-34990, CVE-2026-27447, CVE-2026-34978
Summary
CUPS printing system provides a portable printing layer for
UNIX operating systems. It has been developed by Apple Inc.
to promote a standard printing solution for all UNIX vendors and users.
CUPS provides the System V and Berkeley command-line interfaces.
Update Information:
2.4.17 - security fixes for CVE-2026-39316, CVE-2026-39314, CVE-2026-34979, CVE-2026-34990, CVE-2026-27447, CVE-2026-34978
Topics Covered
Change Log
* Fri Apr 17 2026 Zdenek Dohnal
References
[ 1 ] Bug #2454946 - CVE-2026-34979 cups: OpenPrinting CUPS: Denial of Service via heap-based buffer overflow in job attribute processing
https://bugzilla.redhat.com/show_bug.cgi?id=2454946
[ 2 ] Bug #2454947 - CVE-2026-34990 cups: OpenPrinting CUPS: Privilege escalation via arbitrary file overwrite due to coerced authentication
https://bugzilla.redhat.com/show_bug.cgi?id=2454947
[ 3 ] Bug #2454949 - CVE-2026-27447 cups: OpenPrinting CUPS: Authorization bypass via case-insensitive username comparison
https://bugzilla.redhat.com/show_bug.cgi?id=2454949
[ 4 ] Bug #2454954 - CVE-2026-34980 cups: OpenPrinting CUPS: Shared PostScript queue lets anonymous Print-Job requests reach `lp` code execution over the network
https://bugzilla.redhat.com/show_bug.cgi?id=2454954
[ 5 ] Bug #2454957 - CVE-2026-34978 cups: OpenPrinting CUPS: Denial of Service via path traversal in RSS notifier
https://bugzilla.redhat.com/show_bug.cgi?id=2454957
[ 6 ] B...
Update Instructions
This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-34454fdb74' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label
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Severity
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Critical
Name: cups
Product: Fedora 42
Version: 2.4.17
Release: 1.fc42
Summary: CUPS printing system
Topics Covered
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