{"cve":"CVE-2020-1983","nvd":{"published":"2020-04-22T20:15:11.480","modified":"2026-06-17T03:02:46.137","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","score":6.5},"cwes":["CWE-416"],"references":["http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00022.html","http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00001.html","https://gitlab.freedesktop.org/slirp/libslirp/-/commit/9ac0371bb8c0a40f5d9f82a1c25129660e81df04","https://gitlab.freedesktop.org/slirp/libslirp/-/issues/20","https://lists.debian.org/debian-lts-announce/2020/06/msg00032.html"],"products":["canonical:ubuntu_linux","debian:debian_linux","fedoraproject:fedora","libslirp_project:libslirp","opensuse:leap"],"source":"nvd","synced_at":"2026-10-19T21:04:18.695612450+00:00"},"epss":{"cve":"CVE-2020-1983","score":0.02357,"percentile":0.83757,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}