{"id":"CVE-2026-56109","summary":"ALSA Library \u003c 1.2.16.1 Double-Free via parse_def() in conf.c","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":"2026-07-08T08:13:46.234406707Z","published":"2026-06-22T15:58:42.404Z","related":["SUSE-SU-2026:22291-1","SUSE-SU-2026:22381-1","openSUSE-SU-2026:21075-1"],"database_specific":{"cna_assigner":"VulnCheck","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56109.json","cwe_ids":["CWE-415"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56109.json"},{"type":"ADVISORY","url":"https://github.com/alsa-project/alsa-lib/releases/tag/v1.2.16.1"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56109"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/alsa-library-double-free-via-parse-def-in-conf-c"},{"type":"FIX","url":"https://github.com/alsa-project/alsa-lib/commit/536dd6f8affdf5197c12a63a71c92a70b2833cc0"},{"type":"PACKAGE","url":"https://github.com/alsa-project/alsa-lib"},{"type":"EVIDENCE","url":"https://lore.kernel.org/alsa-devel/CAGt8pqBU0p2voB+qHxWGcNJrKHAcBhAyHUUBPLBN-Yj_SiV6MQ@mail.gmail.com/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/alsa-project/alsa-lib","events":[{"introduced":"0"},{"fixed":"a7babcb8e6361719bf18fa96f11354d125447500"},{"fixed":"536dd6f8affdf5197c12a63a71c92a70b2833cc0"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.2.16.1"}],"source":["DESCRIPTION","REFERENCES"]}}],"versions":["v1.2.16","v1.2.15.3","v1.2.15.2","v1.2.15.1","v1.2.15","v1.2.14","v1.2.13","v1.2.12","v1.2.11","v1.2.10","v1.2.9","v1.2.8","v1.2.7.2","v1.2.7.1","v1.2.7","v1.2.6.1","v1.2.6","v1.2.5","v1.2.4","v1.2.3.2","v1.2.3.1","v1.2.3","v1.2.2","v1.2.1.2","v1.2.1.1","v1.2.1","v1.1.9","v1.1.8","v1.1.7","v1.1.6","v1.1.5","v1.1.4.1","v1.1.4","v1.1.3","v1.1.2","v1.1.1","v1.1.0","v1.0.29","v1.0.28","v1.0.27.2","v1.0.27.1","v1.0.27","v1.0.26","v1.0.25","v1.0.24.1","v1.0.24","v1.0.23","v1.0.22","v1.0.21a","v1.0.21","v1.0.20","v1.0.19","v1.0.18","v1.0.18rc3","v1.0.17a","v1.0.17","v1.0.17rc2","v1.0.17rc1","v1.0.16","v1.0.16rc2","v1.0.16rc1","v1.0.15","v1.0.15rc3","v1.0.15rc2","v1.0.15rc1","v1.0.14a","v1.0.14","v1.0.14rc4","v1.0.14rc3","v1.0.14rc2","v1.0.14rc1","v1.0.13","v1.0.13rc3","v1.0.13rc2","v1.0.13rc1","v1.0.12","v1.0.12rc2","v1.0.12rc1","v1.0.11","v1.0.11rc5","v1.0.11rc4","v1.0.11rc3","v1.0.11rc2","v1.0.11rc1","v1.0.10","v1.0.10rc3","v1.0.10rc2","v1.0.10rc1","v1.0.9","v1.0.9rc4","v1.0.9rc3","v1.0.9rc2","v1.0.9rc1","v1.0.8","v1.0.7","v1.0.6","v1.0.5","v1.0.4","v1.0.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56109.json"}}],"schema_version":"1.7.5","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"}]}