{"id":"CVE-2018-12248","aliases":["DEBIAN-CVE-2018-12248","EUVD-2018-4226","GHSA-96p2-24jg-gc5w","UBUNTU-CVE-2018-12248"],"status":"published","title":"An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with...","description":"An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OP_ENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber.","severity":{"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","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01486,"percentile":0.74222,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2018-06-12T14:00:00Z","modified":"2026-10-23T18:03:53Z","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":"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":"mruby","product":"mruby"}],"references":[{"url":"https://github.com/mruby/mruby/issues/4038","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report"]},{"url":"https://github.com/mruby/mruby/commit/778500563a9f7ceba996937dc886bd8cde29b42b","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-12248"},{"url":"https://github.com/advisories/GHSA-96p2-24jg-gc5w"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-12248","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-12248","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-12248","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2018-12248","description":"An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OP_ENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber.","status":"published","published":"2018-06-12T14:00:00Z","modified":"2024-09-16T16:43:26.889Z","updated_at":"2026-11-02T14:35:06.320867Z"}],"euvd":[{"id":"EUVD-2018-4226","description":"An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OP_ENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber.","status":"published","published":"2018-06-12T14:00:00Z","modified":"2024-09-16T16:43:26Z","updated_at":"2026-11-03T00:55:48.659023Z"}],"ghsa":[{"id":"GHSA-96p2-24jg-gc5w","title":"An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with...","description":"An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OP_ENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber.","status":"published","published":"2022-05-13T01:49:32Z","modified":"2023-02-02T05:01:53Z","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-125"],"updated_at":"2026-11-02T14:51:17.485612Z"}],"nvd":[{"id":"CVE-2018-12248","description":"An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OP_ENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber.","status":"published","published":"2018-06-12T14:29:00.4Z","modified":"2026-06-17T01:37:25.537Z","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","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-125"],"updated_at":"2026-11-02T14:04:29.837913Z"}],"osv":[{"id":"CVE-2018-12248","description":"An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OP_ENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber.","status":"published","published":"2018-06-12T14:29:00.4Z","modified":"2026-10-20T13:26:23.741823236Z","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"}],"updated_at":"2026-11-02T15:44:07.934182Z"},{"id":"DEBIAN-CVE-2018-12248","description":"An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OP_ENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber.","status":"published","published":"2018-06-12T14:29:00.4Z","modified":"2026-10-23T18:03:53.854901411Z","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"}],"updated_at":"2026-11-02T15:45:30.290351Z"},{"id":"UBUNTU-CVE-2018-12248","description":"An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OP_ENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber.","status":"published","published":"2018-06-12T14:29:00Z","modified":"2026-10-17T12:54:45.276283997Z","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"}],"updated_at":"2026-11-02T15:54:16.544091Z"}]}}