Bug 2454954 (CVE-2026-34980)

Summary: CVE-2026-34980 cups: OpenPrinting CUPS: Shared PostScript queue lets anonymous Print-Job requests reach `lp` code execution over the network
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers, zdohnal
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: ---
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A flaw was found in OpenPrinting CUPS. An unauthorized client can exploit this vulnerability by sending a specially crafted print job to a shared PostScript queue without authentication. The server improperly handles the `page-border` value, allowing an attacker to embed and reparse malicious text as a trusted scheduler control record. This can lead to arbitrary code execution with the privileges of the 'lp' user, potentially compromising the affected system.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2454991    
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Description OSIDB Bzimport 2026-04-03 22:01:42 UTC 
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, in a network-exposed cupsd with a shared target queue, an unauthorized client can send a Print-Job to that shared PostScript queue without authentication. The server accepts a page-border value supplied as textWithoutLanguage, preserves an embedded newline through option escaping and reparse, and then reparses the resulting second-line PPD: text as a trusted scheduler control record. A follow-up raw print job can therefore make the server execute an attacker-chosen existing binary such as /usr/bin/vim as lp. At time of publication, there are no publicly available patches.
Comment 2 errata-xmlrpc 2026-07-08 14:06:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:36733 https://access.redhat.com/errata/RHSA-2026:36733
Comment 3 errata-xmlrpc 2026-07-14 20:30:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:39302 https://access.redhat.com/errata/RHSA-2026:39302
Comment 4 errata-xmlrpc 2026-07-14 20:30:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:39316 https://access.redhat.com/errata/RHSA-2026:39316