Two case-insensitive comparisons on request-derived usernames outside the main authorization path in CUPS's scheduler (printer ACL validation and private-attribute filtering) could allow bypass of username-based access controls in certain configurations.

Affected: openEuler:24.03-LTS-SP3: cups

CUPS is the standards-based, open source printing system developed by Apple Inc. for UNIX®-like operating systems. CUPS uses the Internet Printing Protocol (IPP) to support printing to local and network printers.. Security Fix(es):

The cupsUTF32ToUTF8() function in CUPS's cups/transcode.c lacks a source-length bound and can read past the end of the source buffer, resulting in a heap out-of-bounds read. This is reachable via SNMP supply-description parsing in backend/snmp-supplies.c with attacker-controlled content.(CVE-2026-87875)

Two case-insensitive comparisons on request-derived usernames outside the main authorization path in CUPS's scheduler (printer ACL validation and private-attribute filtering) could allow bypass of username-based access controls in certain configurations.(CVE-2026-87876)

cups: OpenPrinting CUPS: Remaining case-insensitive username matching in scheduler side paths (CVE-2026-27447 follow-up)

Affected: Ubuntu:Pro:16.04:LTS: cups, Ubuntu:Pro:18.04:LTS: cups, Ubuntu:Pro:20.04:LTS: cups, Ubuntu:22.04:LTS: cups, Ubuntu:24.04:LTS: cups, Ubuntu:26.04:LTS: cups

Two case-insensitive comparisons on request-derived usernames outside the main authorization path in CUPS's scheduler (printer ACL validation and private-attribute filtering) could allow bypass of username-based access controls in certain configurations.

Ein Angreifer aus einem angrenzenden Netzwerk kann mehrere Schwachstellen in CUPS ausnutzen, um Informationen offenzulegen.