{"id":"CVE-2018-12249","aliases":["DEBIAN-CVE-2018-12249","DLA-2996-1","EUVD-2018-4227","GHSA-3h2j-h4g8-5pmr","UBUNTU-CVE-2018-12249"],"status":"published","title":"An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class_real...","description":"An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class_real because \"class BasicObject\" is not properly supported in class.c.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02086,"percentile":0.81702,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-476"],"published":"2018-06-12T14:00:00Z","modified":"2026-10-23T18:02:58Z","fixes":[{"ecosystem":"Debian:12","package":"mruby","fixed_in":["1.4.1+20180622+git640fca32-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"mruby","fixed_in":["1.4.1+20180622+git640fca32-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"mruby","fixed_in":["1.4.1+20180622+git640fca32-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.1+20180622+git640fca32-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.1+20180622+git640fca32-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.1+20180622+git640fca32-1"}]}]},{"source":"osv","ecosystem":"Debian:9","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.0+20161228+git30d5424a-1+deb9u1"}]}],"versions":["1.2.0+20161228+git30d5424a-1"],"bundled":6},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"mruby","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"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"mruby","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"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.0-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.2-3","3.0.0-1","3.0.0-3"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.0-1","3.2.0-2"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.0-2","3.4.0-3","4.0.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"mruby","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.0-1","3.4.0-2"]}],"products":[{"vendor":"debian","product":"debian_linux"},{"vendor":"mruby","product":"mruby"}],"references":[{"url":"https://github.com/mruby/mruby/issues/4037","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report"]},{"url":"https://github.com/mruby/mruby/commit/faa4eaf6803bd11669bc324b4c34e7162286bfa3","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00006.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-12249"},{"url":"https://github.com/advisories/GHSA-3h2j-h4g8-5pmr"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-12249","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-12249","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-12249","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2018-12249","description":"An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class_real because \"class BasicObject\" is not properly supported in class.c.","status":"published","published":"2018-06-12T14:00:00Z","modified":"2024-08-05T08:30:59.698Z","updated_at":"2026-11-02T14:35:06.679212Z"}],"euvd":[{"id":"EUVD-2018-4227","description":"An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class_real because \"class BasicObject\" is not properly supported in class.c.","status":"published","published":"2018-06-12T14:00:00Z","modified":"2024-08-05T08:30:59Z","updated_at":"2026-11-03T02:39:53.14558Z"}],"ghsa":[{"id":"GHSA-3h2j-h4g8-5pmr","title":"An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class_real...","description":"An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class_real because \"class BasicObject\" is not properly supported in class.c.","status":"published","published":"2022-05-07T00:01:25Z","modified":"2023-02-01T05:02:10Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:49:51.819251Z"}],"nvd":[{"id":"CVE-2018-12249","description":"An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class_real because \"class BasicObject\" is not properly supported in class.c.","status":"published","published":"2018-06-12T14:29:00.46Z","modified":"2026-06-17T01:37:25.673Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:04:29.837913Z"}],"osv":[{"id":"CVE-2018-12249","description":"An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class_real because \"class BasicObject\" is not properly supported in class.c.","status":"published","published":"2018-06-12T14:29:00.46Z","modified":"2026-10-20T13:32:56.985537685Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:07.934182Z"},{"id":"DEBIAN-CVE-2018-12249","description":"An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class_real because \"class BasicObject\" is not properly supported in class.c.","status":"published","published":"2018-06-12T14:29:00.46Z","modified":"2026-10-23T18:02:58.453629859Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:30.290351Z"},{"id":"UBUNTU-CVE-2018-12249","description":"An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class_real because \"class BasicObject\" is not properly supported in class.c.","status":"published","published":"2018-06-12T14:29:00Z","modified":"2026-10-17T12:54:52.022786995Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:16.544091Z"},{"id":"DLA-2996-1","title":"mruby - security update","status":"published","published":"2022-05-06T00:00:00Z","modified":"2026-03-09T01:23:12.964589Z","updated_at":"2026-11-02T15:46:11.189256Z"}]}}