{"id":"AZL-80400","summary":"CVE-2026-4426 affecting package libarchive for versions less than 3.7.7-6","details":"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.","modified":"2026-09-05T05:27:51Z","published":"2026-03-19T15:16:28Z","upstream":["CVE-2026-4426"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4426"}],"affected":[{"package":{"name":"libarchive","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/libarchive"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.7.7-6"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-80400.json"}}],"schema_version":"1.9.0"}