{"id":"USN-4968-2","summary":"lz4 vulnerability","details":"USN-4968-1 fixed a vulnerability in LZ4. This update provides\nthe corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.\n\nOriginal advisory details:\n\n It was discovered that LZ4 incorrectly handled certain memory operations.\n If a user or automated system were tricked into uncompressing a specially-\n crafted LZ4 file, a remote attacker could use this issue to cause LZ4 to\n crash, resulting in a denial of service, or possibly execute arbitrary\n code.\n","modified":"2026-02-10T04:42:12Z","published":"2021-05-31T12:08:03Z","related":["UBUNTU-CVE-2021-3520"],"upstream":["CVE-2021-3520","UBUNTU-CVE-2021-3520"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4968-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3520"}],"affected":[{"package":{"name":"lz4","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/lz4@0.0~r114-2ubuntu1+esm2?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0~r114-2ubuntu1+esm2"}]}],"versions":["0.0~r94-2","0.0~r99-1","0.0~r107-1","0.0~r109-1","0.0~r114-2ubuntu1","0.0~r114-2ubuntu1+esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_version":"0.0~r114-2ubuntu1+esm2","binary_name":"liblz4-1"},{"binary_version":"0.0~r114-2ubuntu1+esm2","binary_name":"liblz4-dev"},{"binary_version":"0.0~r114-2ubuntu1+esm2","binary_name":"liblz4-tool"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:14.04:LTS","cves":[{"id":"CVE-2021-3520","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4968-2.json"}},{"package":{"name":"lz4","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/lz4@0.0~r131-2ubuntu2+esm1?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0~r131-2ubuntu2+esm1"}]}],"versions":["0.0~r131-1","0.0~r131-2","0.0~r131-2ubuntu2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_version":"0.0~r131-2ubuntu2+esm1","binary_name":"liblz4-1"},{"binary_version":"0.0~r131-2ubuntu2+esm1","binary_name":"liblz4-dev"},{"binary_version":"0.0~r131-2ubuntu2+esm1","binary_name":"liblz4-tool"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[{"id":"CVE-2021-3520","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4968-2.json"}}],"schema_version":"1.7.3"}