{"id":"AZL-90204","summary":"CVE-2026-56109 affecting package alsa-lib for versions less than 1.2.16.1-1","details":"The Advanced Linux Sound Architecture (ALSA) library before 1.2.16.1 contains a double-free vulnerability in parse_def() in src/conf.c that allows attackers to corrupt memory by supplying maliciously crafted ALSA configuration text. When parsing nested compound or array configuration blocks, parse_def() fails to check return values before continuing, causing snd_config_delete() to be called twice on the same already-freed node, resulting in a NULL-pointer write or invalid memory read.","modified":"2026-09-01T05:28:09Z","published":"2026-06-22T18:16:48Z","upstream":["CVE-2026-56109"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56109"}],"affected":[{"package":{"name":"alsa-lib","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/alsa-lib"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.16.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-90204.json"}}],"schema_version":"1.9.0"}