{"id":"UBUNTU-CVE-2020-28928","details":"In musl libc through 1.2.1, wcsnrtombs mishandles particular combinations of destination buffer size and source character limit, as demonstrated by an invalid write access (buffer overflow).","modified":"2026-04-22T12:39:30.452596Z","published":"2020-11-24T18:15:00Z","related":["USN-5990-1"],"upstream":["CVE-2020-28928"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-28928"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2020/11/20/4"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5990-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-28928"}],"affected":[{"package":{"name":"musl","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/musl@0.9.15-1ubuntu0.1~esm2?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.15-1ubuntu0.1~esm2"}]}],"versions":["0.9.14-2","0.9.14-2ubuntu1","0.9.15-1","0.9.15-1ubuntu0.1~esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"musl","binary_version":"0.9.15-1ubuntu0.1~esm2"},{"binary_name":"musl-tools","binary_version":"0.9.15-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28928.json"}},{"package":{"name":"musl","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/musl@1.1.9-1ubuntu0.1~esm3?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.9-1ubuntu0.1~esm3"}]}],"versions":["1.1.9-1","1.1.9-1ubuntu0.1~esm2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"musl","binary_version":"1.1.9-1ubuntu0.1~esm3"},{"binary_name":"musl-tools","binary_version":"1.1.9-1ubuntu0.1~esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28928.json"}},{"package":{"name":"musl","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/musl@1.1.19-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.19-1ubuntu0.1~esm1"}]}],"versions":["1.1.16-3","1.1.18-1","1.1.19-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"musl","binary_version":"1.1.19-1ubuntu0.1~esm1"},{"binary_version":"1.1.19-1ubuntu0.1~esm1","binary_name":"musl-tools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28928.json"}},{"package":{"name":"musl","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/musl@1.1.24-1ubuntu0.1~esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.24-1ubuntu0.1~esm1"}]}],"versions":["1.1.23-2build1","1.1.24-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"musl","binary_version":"1.1.24-1ubuntu0.1~esm1"},{"binary_name":"musl-tools","binary_version":"1.1.24-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28928.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}