{"id":"UBUNTU-CVE-2018-20996","details":"An issue was discovered in the crossbeam crate before 0.4.1 for Rust. There is a double free because of destructor mishandling.","modified":"2026-04-27T15:49:15.811216Z","published":"2019-08-26T18:15:00Z","upstream":["CVE-2018-20996"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-20996"},{"type":"REPORT","url":"https://rustsec.org/advisories/RUSTSEC-2018-0009.html"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-20996"}],"affected":[{"package":{"name":"rust-crossbeam-epoch","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/rust-crossbeam-epoch@0.7.2-3?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.7.1-1","0.7.2-2","0.7.2-3"],"ecosystem_specific":{"binaries":[{"binary_version":"0.7.2-3","binary_name":"librust-crossbeam-epoch+alloc-dev"},{"binary_version":"0.7.2-3","binary_name":"librust-crossbeam-epoch+lazy-static-dev"},{"binary_version":"0.7.2-3","binary_name":"librust-crossbeam-epoch+std-dev"},{"binary_version":"0.7.2-3","binary_name":"librust-crossbeam-epoch-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20996.json"}},{"package":{"name":"rust-crossbeam-epoch","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/rust-crossbeam-epoch@0.8.2-2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.2-1","0.8.2-2"],"ecosystem_specific":{"binaries":[{"binary_version":"0.8.2-2","binary_name":"librust-crossbeam-epoch+alloc-dev"},{"binary_version":"0.8.2-2","binary_name":"librust-crossbeam-epoch+lazy-static-dev"},{"binary_version":"0.8.2-2","binary_name":"librust-crossbeam-epoch+std-dev"},{"binary_version":"0.8.2-2","binary_name":"librust-crossbeam-epoch-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20996.json"}},{"package":{"name":"rust-crossbeam-epoch","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/rust-crossbeam-epoch@0.9.18-1?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.13-1","0.9.18-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.18-1","binary_name":"librust-crossbeam-epoch+std-dev"},{"binary_version":"0.9.18-1","binary_name":"librust-crossbeam-epoch-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20996.json"}},{"package":{"name":"rust-crossbeam-epoch","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/rust-crossbeam-epoch@0.9.18-1?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.18-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.18-1","binary_name":"librust-crossbeam-epoch+std-dev"},{"binary_version":"0.9.18-1","binary_name":"librust-crossbeam-epoch-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20996.json"}},{"package":{"name":"rust-crossbeam-epoch","ecosystem":"Ubuntu:26.04","purl":"pkg:deb/ubuntu/rust-crossbeam-epoch@0.9.18-1?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.18-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.9.18-1","binary_name":"librust-crossbeam-epoch+std-dev"},{"binary_version":"0.9.18-1","binary_name":"librust-crossbeam-epoch-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20996.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}