{"id":"UBUNTU-CVE-2026-1998","details":"A flaw has been found in micropython up to 1.27.0. This vulnerability affects the function mp_import_all of the file py/runtime.c. This manipulation causes memory corruption. The attack needs to be launched locally. The exploit has been published and may be used. Patch name: 570744d06c5ba9dba59b4c3f432ca4f0abd396b6. It is suggested to install a patch to address this issue.","modified":"2026-05-20T16:24:08.035205744Z","published":"2026-02-06T07:16:00Z","upstream":["CVE-2026-1998"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-1998"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-1998"},{"type":"REPORT","url":"https://github.com/micropython/micropython/issues/18639"},{"type":"REPORT","url":"https://github.com/micropython/micropython/pull/18671"},{"type":"REPORT","url":"https://github.com/dpgeorge/micropython/commit/570744d06c5ba9dba59b4c3f432ca4f0abd396b6"},{"type":"REPORT","url":"https://github.com/micropython/micropython/"},{"type":"REPORT","url":"https://github.com/micropython/micropython/issues/18639#issue-3780651410"},{"type":"REPORT","url":"https://vuldb.com/?ctiid.344546"},{"type":"REPORT","url":"https://vuldb.com/?id.344546"},{"type":"REPORT","url":"https://vuldb.com/?submit.743396"}],"affected":[{"package":{"name":"micropython","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/micropython?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.12-1","1.12-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"micropython","binary_version":"1.12-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1998.json"}},{"package":{"name":"micropython","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/micropython?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.17+ds-1ubuntu1","1.17+ds-1.1","1.17+ds-1.1ubuntu2","1.17+ds-1.1ubuntu2+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"micropython","binary_version":"1.17+ds-1.1ubuntu2+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1998.json"}},{"package":{"name":"micropython","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/micropython?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.19.1+ds-1","1.22.1+ds-1","1.22.1+ds-1build1","1.22.1+ds-1build2","1.22.1+ds-1ubuntu0.24.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"micropython","binary_version":"1.22.1+ds-1ubuntu0.24.04.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1998.json"}},{"package":{"name":"micropython","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/micropython?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.24.1+ds-1","1.25.0+ds-1"],"ecosystem_specific":{"binaries":[{"binary_name":"micropython","binary_version":"1.25.0+ds-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1998.json"}},{"package":{"name":"micropython","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/micropython?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.25.0+ds-1","1.26.1+ds-1"],"ecosystem_specific":{"binaries":[{"binary_name":"micropython","binary_version":"1.26.1+ds-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-1998.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:N/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P"},{"type":"Ubuntu","score":"medium"}]}