{"id":"DEBIAN-CVE-2026-56109","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":"2026-09-14T17:03:45.876422996Z","published":"2026-06-22T18:16:48.557Z","upstream":["CVE-2026-56109"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-56109"}],"affected":[{"package":{"name":"alsa-lib","ecosystem":"Debian:12","purl":"pkg:deb/debian/alsa-lib?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.10-1","1.2.10-2","1.2.10-3","1.2.10-3.1","1.2.10-3.1~exp1","1.2.10-3.1~exp2","1.2.10-3.2","1.2.11-1","1.2.12-1","1.2.13-1","1.2.14-1","1.2.14-2","1.2.15-1","1.2.15-2","1.2.15.1-1","1.2.15.3-1","1.2.16-1","1.2.16.1-1","1.2.16.1-1~bpo13+1","1.2.8-1","1.2.9-1","1.2.9-2"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56109.json"}},{"package":{"name":"alsa-lib","ecosystem":"Debian:13","purl":"pkg:deb/debian/alsa-lib?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.14-1","1.2.14-1+deb13u1","1.2.14-2","1.2.15-1","1.2.15-2","1.2.15.1-1","1.2.15.3-1","1.2.16-1","1.2.16.1-1","1.2.16.1-1~bpo13+1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56109.json"}},{"package":{"name":"alsa-lib","ecosystem":"Debian:14","purl":"pkg:deb/debian/alsa-lib?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.16.1-1"}]}],"versions":["1.2.14-1","1.2.14-2","1.2.15-1","1.2.15-2","1.2.15.1-1","1.2.15.3-1","1.2.16-1","1.2.16.1-1~bpo13+1"],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-56109.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}