Ubuntu 26.04 LTS CUPS At High Regression Risk with USN-8405-2 Update

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 26.04 LTS - Ubuntu 25.10 - Ubuntu 24.04 LTS - Ubuntu 22.04 LTS Summary: USN-8405-1 introduced a regression in CUPS Software Description: - cups: Common UNIX Printing System(tm) Details: USN-8405-1 fixed vulnerabilities in CUPS. The update introduced a regression that cause CUPS to crash when parsing certain large printer PPD files. This update fixes the problem. Original advisory details: Ariel Silver discovered that CUPS incorrectly handled username comparisons during authorization checks. A local attacker could possibly use this issue to gain unauthorized access to restricted operations. (CVE-2026-27447) Asim Viladi Oglu Manizada discovered that CUPS incorrectly handled notify-recipient-uri values in the RSS notifier. A remote attacker could possibly use this issue to overwrite lp-writable files and cause a denial of service. (CVE-2026-34978) Jacob Newman discovered that CUPS incorre...