{"id":"UBUNTU-CVE-2020-36401","details":"mruby 2.1.2 has a double free in mrb_default_allocf (called from mrb_free and obj_free).","modified":"2025-10-24T04:49:00Z","published":"2021-07-01T03:15:00Z","upstream":["CVE-2020-36401"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-36401"},{"type":"REPORT","url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=23801"},{"type":"REPORT","url":"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/mruby/OSV-2020-744.yaml"},{"type":"REPORT","url":"https://github.com/mruby/mruby/commit/97319697c8f9f6ff27b32589947e1918e3015503"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-36401"}],"affected":[{"package":{"name":"mruby","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/mruby@1.2.0+20160315+git4f20d58a-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.0+20150817+gita1731254-1","1.1.0+20150906+git1cbbb7e1-1","1.2.0+20160315+git4f20d58a-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.2.0+20160315+git4f20d58a-1","binary_name":"libmruby-dev"},{"binary_version":"1.2.0+20160315+git4f20d58a-1","binary_name":"mruby"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-36401.json"}},{"package":{"name":"mruby","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mruby@1.4.0-1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.0-1","1.3.0+20170925+git38185028-1","1.3.0+20171029+git77edafb0-1","1.4.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.0-1","binary_name":"libmruby-dev"},{"binary_version":"1.4.0-1","binary_name":"mruby"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-36401.json"}},{"package":{"name":"mruby","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/mruby@2.0.0-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.0-1","binary_name":"libmruby-dev"},{"binary_version":"2.0.0-1","binary_name":"mruby"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-36401.json"}},{"package":{"name":"mruby","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/mruby@3.0.0-3?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.2-3","3.0.0-1","3.0.0-3"],"ecosystem_specific":{"binaries":[{"binary_version":"3.0.0-3","binary_name":"libmruby-dev"},{"binary_version":"3.0.0-3","binary_name":"mruby"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-36401.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}