USN-8405-2

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 incorrectly handled filter option strings when processing job attributes. An attacker could use this issue to cause CUPS to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-34979)

Asim Viladi Oglu Manizada discovered that CUPS incorrectly handled page-border values in shared PostScript queues. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2026-34980)

Asim Viladi Oglu Manizada discovered that CUPS incorrectly handled localhost authentication to attacker-controlled IPP services. A local attacker could possibly use this issue to overwrite arbitrary files and execute arbitrary code. (CVE-2026-34990)

Tomer Fichman discovered that CUPS incorrectly handled negative job-password-supported values. A local attacker could possibly use this issue to cause CUPS to crash, resulting in a denial of service. (CVE-2026-39314)

Tomer Fichman discovered that CUPS incorrectly handled temporary printer deletion. An attacker could possibly use this issue to cause CUPS to crash, resulting in a denial of service, or to execute arbitrary code. (CVE-2026-39316)

Tomer Fichman discovered that CUPS incorrectly handled certain malformed SNMP responses. An attacker could possibly use this issue to obtain sensitive information. (CVE-2026-41079)