{"id":"UBUNTU-CVE-2021-4156","details":"An out-of-bounds read flaw was found in libsndfile's FLAC codec functionality. An attacker who is able to submit a specially crafted file (via tricking a user to open or otherwise) to an application linked with libsndfile and using the FLAC codec, could trigger an out-of-bounds read that would most likely cause a crash but could potentially leak memory information that could be used in further exploitation of other flaws.","modified":"2026-04-22T14:58:29.100468Z","published":"2022-03-23T20:15:00Z","related":["USN-5409-1","USN-7273-1"],"upstream":["CVE-2021-4156"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-4156"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5409-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-4156"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7273-1"}],"affected":[{"package":{"name":"libsndfile","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/libsndfile@1.0.25-7ubuntu2.2+esm4?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.25-7ubuntu2.2+esm4"}]}],"versions":["1.0.25-7ubuntu1","1.0.25-7ubuntu2","1.0.25-7ubuntu2.1","1.0.25-7ubuntu2.2","1.0.25-7ubuntu2.2+esm1","1.0.25-7ubuntu2.2+esm2","1.0.25-7ubuntu2.2+esm3"],"ecosystem_specific":{"priority_reason":"This only results in a DoS when reading a FLAC file","availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_name":"libsndfile1","binary_version":"1.0.25-7ubuntu2.2+esm4"},{"binary_name":"sndfile-programs","binary_version":"1.0.25-7ubuntu2.2+esm4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4156.json"}},{"package":{"name":"libsndfile","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/libsndfile@1.0.25-10ubuntu0.16.04.3+esm2?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.25-10ubuntu0.16.04.3+esm2"}]}],"versions":["1.0.25-9.1","1.0.25-10","1.0.25-10ubuntu0.16.04.1","1.0.25-10ubuntu0.16.04.2","1.0.25-10ubuntu0.16.04.3","1.0.25-10ubuntu0.16.04.3+esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"libsndfile1","binary_version":"1.0.25-10ubuntu0.16.04.3+esm2"},{"binary_name":"sndfile-programs","binary_version":"1.0.25-10ubuntu0.16.04.3+esm2"}],"priority_reason":"This only results in a DoS when reading a FLAC file"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4156.json"}},{"package":{"name":"libsndfile","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/libsndfile@1.0.28-4ubuntu0.18.04.2+esm2?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.28-4ubuntu0.18.04.2+esm2"}]}],"versions":["1.0.28-4","1.0.28-4ubuntu0.18.04.1","1.0.28-4ubuntu0.18.04.2","1.0.28-4ubuntu0.18.04.2+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libsndfile1","binary_version":"1.0.28-4ubuntu0.18.04.2+esm2"},{"binary_name":"sndfile-programs","binary_version":"1.0.28-4ubuntu0.18.04.2+esm2"}],"priority_reason":"This only results in a DoS when reading a FLAC file","availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4156.json"}},{"package":{"name":"libsndfile","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libsndfile@1.0.28-7ubuntu0.3?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.28-7ubuntu0.3"}]}],"versions":["1.0.28-6","1.0.28-7","1.0.28-7ubuntu0.1","1.0.28-7ubuntu0.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libsndfile1","binary_version":"1.0.28-7ubuntu0.3"},{"binary_name":"sndfile-programs","binary_version":"1.0.28-7ubuntu0.3"}],"priority_reason":"This only results in a DoS when reading a FLAC file"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4156.json"}},{"package":{"name":"libsndfile","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libsndfile@1.0.31-2ubuntu0.2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.31-2ubuntu0.2"}]}],"versions":["1.0.31-2","1.0.31-2build1","1.0.31-2ubuntu0.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libsndfile1","binary_version":"1.0.31-2ubuntu0.2"},{"binary_name":"sndfile-programs","binary_version":"1.0.31-2ubuntu0.2"}],"priority_reason":"This only results in a DoS when reading a FLAC file"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4156.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}