{"id":"UBUNTU-CVE-2019-11922","details":"A race condition in the one-pass compression functions of Zstandard prior to version 1.3.8 could allow an attacker to write bytes out of bounds if an output buffer smaller than the recommended size was used.","modified":"2026-02-04T03:37:59.766340Z","published":"2019-07-25T00:00:00Z","related":["USN-4108-1","USN-5593-1"],"upstream":["CVE-2019-11922"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-11922"},{"type":"REPORT","url":"https://github.com/facebook/zstd/pull/1404/commits/3e5cdf1b6a85843e991d7d10f6a2567c15580da0"},{"type":"REPORT","url":"https://www.facebook.com/security/advisories/cve-2019-11922"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4108-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5593-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-11922"}],"affected":[{"package":{"name":"libzstd","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/libzstd@1.3.1+dfsg-1~ubuntu0.16.04.1+esm2?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.1+dfsg-1~ubuntu0.16.04.1+esm2"}]}],"versions":["0.4.5-1","0.5.1-1","1.3.1+dfsg-1~ubuntu0.16.04.1","1.3.1+dfsg-1~ubuntu0.16.04.1+esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_version":"1.3.1+dfsg-1~ubuntu0.16.04.1+esm2","binary_name":"libzstd1"},{"binary_version":"1.3.1+dfsg-1~ubuntu0.16.04.1+esm2","binary_name":"libzstd1-dev"},{"binary_version":"1.3.1+dfsg-1~ubuntu0.16.04.1+esm2","binary_name":"zstd"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-11922.json"}},{"package":{"name":"libzstd","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libzstd@1.3.3+dfsg-2ubuntu1.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.3+dfsg-2ubuntu1.1"}]}],"versions":["1.3.1+dfsg-1","1.3.2+dfsg-1","1.3.2+dfsg2-1","1.3.3+dfsg-1","1.3.3+dfsg-1ubuntu1","1.3.3+dfsg-2ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.3.3+dfsg-2ubuntu1.1","binary_name":"libzstd-dev"},{"binary_version":"1.3.3+dfsg-2ubuntu1.1","binary_name":"libzstd1"},{"binary_version":"1.3.3+dfsg-2ubuntu1.1","binary_name":"libzstd1-dev"},{"binary_version":"1.3.3+dfsg-2ubuntu1.1","binary_name":"zstd"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-11922.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}