{"id":"UBUNTU-CVE-2020-1983","details":"A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows crafted packets to cause a denial of service.","modified":"2026-04-22T14:10:51.212859Z","published":"2020-04-22T20:15:00Z","related":["USN-4372-1","USN-7094-1"],"upstream":["CVE-2020-1983"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-1983"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4372-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-1983"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7094-1"}],"affected":[{"package":{"name":"qemu","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/qemu@2.0.0+dfsg-2ubuntu1.47+esm4?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.0+dfsg-2ubuntu1.47+esm4"}]}],"versions":["1.5.0+dfsg-3ubuntu5","1.5.0+dfsg-3ubuntu6","1.6.0+dfsg-2ubuntu1","1.6.0+dfsg-2ubuntu2","1.6.0+dfsg-2ubuntu3","1.6.0+dfsg-2ubuntu4","1.7.0+dfsg-2ubuntu1","1.7.0+dfsg-2ubuntu2","1.7.0+dfsg-2ubuntu3","1.7.0+dfsg-2ubuntu4","1.7.0+dfsg-2ubuntu5","1.7.0+dfsg-2ubuntu7","1.7.0+dfsg-2ubuntu8","1.7.0+dfsg-2ubuntu9","1.7.0+dfsg-3ubuntu1~ppa1","1.7.0+dfsg-3ubuntu1","1.7.0+dfsg-3ubuntu2","1.7.0+dfsg-3ubuntu3","1.7.0+dfsg-3ubuntu4","1.7.0+dfsg-3ubuntu5","1.7.0+dfsg-3ubuntu6","1.7.0+dfsg-3ubuntu7","2.0.0~rc1+dfsg-0ubuntu1","2.0.0~rc1+dfsg-0ubuntu2","2.0.0~rc1+dfsg-0ubuntu3","2.0.0~rc1+dfsg-0ubuntu3.1","2.0.0+dfsg-2ubuntu1","2.0.0+dfsg-2ubuntu1.1","2.0.0+dfsg-2ubuntu1.2","2.0.0+dfsg-2ubuntu1.3","2.0.0+dfsg-2ubuntu1.5","2.0.0+dfsg-2ubuntu1.6","2.0.0+dfsg-2ubuntu1.7","2.0.0+dfsg-2ubuntu1.8","2.0.0+dfsg-2ubuntu1.9","2.0.0+dfsg-2ubuntu1.10","2.0.0+dfsg-2ubuntu1.11","2.0.0+dfsg-2ubuntu1.13","2.0.0+dfsg-2ubuntu1.14","2.0.0+dfsg-2ubuntu1.15","2.0.0+dfsg-2ubuntu1.16","2.0.0+dfsg-2ubuntu1.17","2.0.0+dfsg-2ubuntu1.18","2.0.0+dfsg-2ubuntu1.19","2.0.0+dfsg-2ubuntu1.20","2.0.0+dfsg-2ubuntu1.21","2.0.0+dfsg-2ubuntu1.22","2.0.0+dfsg-2ubuntu1.24","2.0.0+dfsg-2ubuntu1.25","2.0.0+dfsg-2ubuntu1.26","2.0.0+dfsg-2ubuntu1.27","2.0.0+dfsg-2ubuntu1.28","2.0.0+dfsg-2ubuntu1.29","2.0.0+dfsg-2ubuntu1.30","2.0.0+dfsg-2ubuntu1.31","2.0.0+dfsg-2ubuntu1.32","2.0.0+dfsg-2ubuntu1.33","2.0.0+dfsg-2ubuntu1.34","2.0.0+dfsg-2ubuntu1.35","2.0.0+dfsg-2ubuntu1.36","2.0.0+dfsg-2ubuntu1.38","2.0.0+dfsg-2ubuntu1.39","2.0.0+dfsg-2ubuntu1.40","2.0.0+dfsg-2ubuntu1.41","2.0.0+dfsg-2ubuntu1.42","2.0.0+dfsg-2ubuntu1.43","2.0.0+dfsg-2ubuntu1.44","2.0.0+dfsg-2ubuntu1.45","2.0.0+dfsg-2ubuntu1.46","2.0.0+dfsg-2ubuntu1.47","2.0.0+dfsg-2ubuntu1.47+esm1","2.0.0+dfsg-2ubuntu1.47+esm2","2.0.0+dfsg-2ubuntu1.47+esm3"],"ecosystem_specific":{"availability":"Available 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