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wid-sec-w-2026-0803  ·  Published 2026-03-19  ·  View on BSI CERT-Bund ↗

libarchive: Multiple Vulnerabilities allow Offenlegung from Informationen and DoS

CVSS 7.5 HIGH

Risk Summary

A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (`pz_log2_bs`) read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect memory allocation and potential application crashes, resulting in a denial-of-service (DoS) condition.

Affected Vendors

Open Source

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