{"id":"UBUNTU-CVE-2025-12875","details":"A weakness has been identified in mruby 3.4.0. This vulnerability affects the function ary_fill_exec of the file mrbgems/mruby-array-ext/src/array.c. Executing a manipulation of the argument start/length can lead to out-of-bounds write. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. This patch is called 93619f06dd378db6766666b30c08978311c7ec94. It is best practice to apply a patch to resolve this issue.","modified":"2026-05-20T16:20:21.803592938Z","published":"2025-11-07T21:15:00Z","upstream":["CVE-2025-12875"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-12875"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-12875"},{"type":"REPORT","url":"https://github.com/mruby/mruby/issues/6650"},{"type":"REPORT","url":"https://github.com/makesoftwaresafe/mruby/commit/93619f06dd378db6766666b30c08978311c7ec94"},{"type":"REPORT","url":"https://github.com/mruby/mruby/issues/6650#event-20443453808"},{"type":"REPORT","url":"https://github.com/mruby/mruby/issues/6650#issuecomment-3430851605"},{"type":"REPORT","url":"https://vuldb.com/?ctiid.331511"},{"type":"REPORT","url":"https://vuldb.com/?id.331511"},{"type":"REPORT","url":"https://vuldb.com/?submit.680879"}],"affected":[{"package":{"name":"mruby","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/mruby?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_name":"mruby","binary_version":"1.2.0+20160315+git4f20d58a-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-12875.json"}},{"package":{"name":"mruby","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mruby?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_name":"mruby","binary_version":"1.4.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-12875.json"}},{"package":{"name":"mruby","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/mruby?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":"mruby"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-12875.json"}},{"package":{"name":"mruby","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/mruby?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_name":"mruby","binary_version":"3.0.0-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-12875.json"}},{"package":{"name":"mruby","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/mruby?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.0-1","3.2.0-2"],"ecosystem_specific":{"binaries":[{"binary_name":"mruby","binary_version":"3.2.0-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-12875.json"}},{"package":{"name":"mruby","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/mruby?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.3.0-1","binary_name":"mruby"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-12875.json"}},{"package":{"name":"mruby","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/mruby?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.0-1","3.4.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"3.4.0-2","binary_name":"mruby"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-12875.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"},{"type":"Ubuntu","score":"medium"}]}