{"id":"CVE-2020-36434","aliases":["EUVD-2021-1511","GHSA-2f5j-3mhq-xv58","RUSTSEC-2020-0100"],"status":"published","title":"Double free in sys-info","description":"An issue was discovered in the sys-info crate before 0.8.0 for Rust. sys_info::disk_info calls can trigger a double free.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.0123,"percentile":0.69317,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-415"],"published":"2020-05-31T12:00:00Z","modified":"2026-06-17T03:15:29Z","fixes":[{"ecosystem":"crates.io","package":"sys-info","fixed_in":["0.8.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"crates.io","package":"sys-info","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.0"}]}]},{"source":"osv","ecosystem":"crates.io","package":"sys-info","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.8.0"}]}]},{"source":"osv","ecosystem":"crates.io","package":"sys-info","ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"},{"fixed":"0.8.0"}]}]}],"products":[{"vendor":"sys-info_project","product":"sys-info"}],"references":[{"url":"https://rustsec.org/advisories/RUSTSEC-2020-0100.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","web","advisory"]},{"url":"https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/sys-info/RUSTSEC-2020-0100.md","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-36434","tags":["advisory"]},{"url":"https://github.com/FillZpp/sys-info-rs/issues/63","tags":["web","report"]},{"url":"https://github.com/advisories/GHSA-2f5j-3mhq-xv58"},{"url":"https://github.com/FillZpp/sys-info-rs","tags":["package"]},{"url":"https://crates.io/crates/sys-info","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2020-36434","description":"An issue was discovered in the sys-info crate before 0.8.0 for Rust. sys_info::disk_info calls can trigger a double free.","status":"published","published":"2021-08-08T05:19:21Z","modified":"2024-08-04T17:30:08.077Z","updated_at":"2026-11-02T14:35:55.128961Z"}],"euvd":[{"id":"EUVD-2021-1511","description":"An issue was discovered in the sys-info crate before 0.8.0 for Rust. sys_info::disk_info calls can trigger a double free.","status":"published","published":"2021-08-08T05:19:21Z","modified":"2024-08-04T17:30:08Z","updated_at":"2026-11-03T03:07:03.010139Z"}],"ghsa":[{"id":"GHSA-2f5j-3mhq-xv58","title":"Double free in sys-info ","description":"Affected versions of sys-info use a static, global, list to store temporary disk information while running. The function that cleans up this list, DFCleanup, assumes a single threaded environment and will try to free the same memory twice in a multithreaded environment. This results in consistent double-frees and segfaults when calling sys_info::disk_info from multiple threads at once. The issue was fixed by moving the global variable into a local scope.","status":"published","published":"2021-08-25T20:58:15Z","modified":"2023-06-13T22:04:50Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T14:36:54.225318Z"}],"nvd":[{"id":"CVE-2020-36434","description":"An issue was discovered in the sys-info crate before 0.8.0 for Rust. sys_info::disk_info calls can trigger a double free.","status":"published","published":"2021-08-08T06:15:06.89Z","modified":"2026-06-17T03:15:29.05Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T14:06:44.292752Z"}],"osv":[{"id":"GHSA-2f5j-3mhq-xv58","title":"Double free in sys-info ","description":"Affected versions of sys-info use a static, global, list to store temporary disk information while running. The function that cleans up this list, DFCleanup, assumes a single threaded environment and will try to free the same memory twice in a multithreaded environment. This results in consistent double-frees and segfaults when calling sys_info::disk_info from multiple threads at once. The issue was fixed by moving the global variable into a local scope.","status":"published","published":"2021-08-25T20:58:15Z","modified":"2023-11-08T04:03:44.601087Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-415"],"updated_at":"2026-11-02T15:46:34.338541Z"},{"id":"RUSTSEC-2020-0100","title":"Double free when calling `sys_info::disk_info` from multiple threads","description":"Affected versions of `sys-info` use a static, global, list to store temporary disk information while running. The function that cleans up this list,\n`DFCleanup`, assumes a single threaded environment and will try to free the same memory twice in a multithreaded environment.\n\nThis results in consistent double-frees and segfaults when calling `sys_info::disk_info` from multiple threads at once.\n\nThe issue was fixed by moving the global variable into a local scope.\n\n## Safer Alternatives:\n - [`sysinfo`](https://crates.io/crates/sysinfo)","status":"published","published":"2020-05-31T12:00:00Z","modified":"2023-11-08T04:03:44.601087Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:53:39.492624Z"}]}}