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OpenAdvisories
Medium ALAS2023-2026-1668 2 CVEs

Moderate: cups security update (Amazon Linux 2023)

Published May 11, 2026 · Updated May 13, 2026

Summary

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-41079: OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.17, a network-adjacent attacker can send a crafted SNMP response to the CUPS SNMP backend that causes an out-of-bounds read of up to 176 bytes past a stack buffer. The leaked memory is converted from UTF-16 to UTF-8 and stored as printer supply description strings, which are subsequently visible to authenticated users via IPP Get-Printer-Attributes responses and the CUPS web interface. This vulnerability is fixed in 2.4.17. CVE-2026-27447: OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, CUPS daemon (cupsd) contains an authorization bypass vulnerability due to case-insensitive username comparison during authorization checks. The vulnerability allows an unprivileged user to gain unauthorized access to restricted operations by using a user with a username that differs only in case from an authorized user. At time of publication, there are no publicly available patches.

Fixed packages 15

ReleasePackageFixed in
Amazon Linux · 2023 cups 1:2.4.19-1.amzn2023.0.1
Amazon Linux · 2023 cups-client 1:2.4.19-1.amzn2023.0.1
Amazon Linux · 2023 cups-client-debuginfo 1:2.4.19-1.amzn2023.0.1
Amazon Linux · 2023 cups-debuginfo 1:2.4.19-1.amzn2023.0.1
Amazon Linux · 2023 cups-debugsource 1:2.4.19-1.amzn2023.0.1
Amazon Linux · 2023 cups-devel 1:2.4.19-1.amzn2023.0.1
Amazon Linux · 2023 cups-filesystem 1:2.4.19-1.amzn2023.0.1
Amazon Linux · 2023 cups-ipptool 1:2.4.19-1.amzn2023.0.1
Amazon Linux · 2023 cups-ipptool-debuginfo 1:2.4.19-1.amzn2023.0.1
Amazon Linux · 2023 cups-libs 1:2.4.19-1.amzn2023.0.1
Amazon Linux · 2023 cups-libs-debuginfo 1:2.4.19-1.amzn2023.0.1
Amazon Linux · 2023 cups-lpd 1:2.4.19-1.amzn2023.0.1
Amazon Linux · 2023 cups-lpd-debuginfo 1:2.4.19-1.amzn2023.0.1
Amazon Linux · 2023 cups-printerapp 1:2.4.19-1.amzn2023.0.1
Amazon Linux · 2023 cups-printerapp-debuginfo 1:2.4.19-1.amzn2023.0.1

Vulnerabilities 2

  • Medium 4.8

    OpenPrinting CUPS: Authorization bypass via case-insensitive group-member lookup

    OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, CUPS daemon (cupsd) contains an authorization bypass vulnerability due to case-insensitive username comparison during authorizat…

  • Medium 4.3

    OpenPrinting CUPS: Heap out-of-bounds read in SNMP supply-level polling leaks stack memory to authenticated users

    OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.17, a network-adjacent attacker can send a crafted SNMP response to the CUPS SNMP backend that causes an out-of-bounds read of up to 176 bytes pa…

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-27447.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-41079.html