Integer Overflow in HPLIP Leading to Privilege Escalation

Executive Summary

CVE-2026-14544 is a vulnerability in HPLIP (HP Linux Imaging and Printing Software) that results from an incomplete fix for a previous issue (CVE-2026-8631). The flaw exists in the hpcups processing path, where an integer overflow can occur when handling specially crafted print data. This happens because the fix for the original vulnerability only partially protected the multiplication of variables, leaving one variable unchecked. This unchecked variable can be manipulated by an attacker through crafted input, potentially leading to arbitrary code execution.

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Impact Analysis

This vulnerability can allow a remote attacker to escalate privileges or execute arbitrary code on the affected system. Because the flaw is in the printing software, an attacker could exploit it by sending specially crafted print data, potentially gaining control over the system with high severity impact. The CVSS score of 9.8 indicates a critical risk with network attack vector, no required privileges or user interaction, and high impact on confidentiality, integrity, and availability.

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Mitigation Strategies

This vulnerability is due to an incomplete fix in the hpcups component of HPLIP, which allows an integer overflow leading to arbitrary code execution.

Immediate mitigation steps would involve updating HPLIP to a version where this issue is fully fixed, as the current fix is incomplete and leaves a variable unchecked.

Since the bug is reported with high priority and severity, monitoring for updates or patches from your Linux distribution or HPLIP maintainers is critical.

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