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CVE-2026-5121 is an integer overflow vulnerability in libarchive's zisofs block pointer allocation logic on 32-bit systems. Processing a specially crafted ISO9660 image can trigger the overflow and subsequently cause a heap buffer overflow, potentially allowing arbitrary code execution. Applications that use vulnerable libarchive code to process attacker-controlled images expose the vulnerable functionality.
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An integer overflow in libarchive's zisofs block pointer allocation logic on 32-bit systems can cause a heap buffer overflow when processing a specially crafted ISO9660 image, potentially allowing arbitrary code execution. The plugin rates the vulnerability critical, with a CVSS v3 base score of 9.8. Updating libarchive and related packages to version 3.7.4-4+e5 or later addresses the issue.
A libarchive vulnerability that allows arbitrary code execution via an integer overflow in ISO9660 image processing.
A libarchive arbitrary code execution vulnerability caused by an integer overflow in ISO9660 image processing.
A libarchive integer-overflow vulnerability in ISO9660 image processing that allows arbitrary code execution.
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