CLSA-2026-1792818643 libarchive: Fix of 2 CVEs

CVE-2021-23177: fix extraction of ACLs to the symlink target instead of the link - CVE-2021-31566: do not follow symlinks when fixing up permissions and file flags - CVE-2026-5121: validate pzlog2bs in the iso9660 zisofs reader...

AZL-80400 CVE-2026-4426 affecting package libarchive for versions less than 3.7.7-6

A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field pzlog2bs read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to...

CVE-2026-4426

A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field pzlog2bs read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to...

CVE-2026-4426

A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field pzlog2bs read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to...

CVE-2026-4426 Libarchive: libarchive: denial of service via malformed iso file processing

A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field pzlog2bs read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to...

CVE-2026-4426

A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field "pzlog2bs" read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to...

CVE-2026-4426

A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field pzlog2bs read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to...

libarchive security vulnerabilities

Libarchive is an open-source multi-format archive and compression library developed by Libarchive. There is a security vulnerability in Libarchive, which stems from undefined behavior in the zisofs decompression logic. The improper validation of the pzlog2bs field read from the ISO9660 Rock Ridge...