{"cve":"CVE-2024-8947","nvd":{"published":"2024-09-17T19:15:29.483","modified":"2026-06-17T08:23:36.640","status":"Analyzed","description":"A vulnerability was found in MicroPython 1.22.2. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file py/objarray.c. The manipulation leads to use after free. The attack can be launched remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. Upgrading to version 1.23.0 is able to address this issue. The identifier of the patch is 4bed614e707c0644c06e117f848fa12605c711cd. It is recommended to upgrade the affected component. In micropython objarray component, when a bytes object is resized and copied into itself, it may reference memory that has already been freed.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","score":6.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1},"cwes":["CWE-416"],"references":["https://github.com/micropython/micropython/commit/4bed614e707c0644c06e117f848fa12605c711cd","https://github.com/micropython/micropython/issues/13283","https://github.com/micropython/micropython/issues/13283#issuecomment-1918479709","https://github.com/micropython/micropython/releases/tag/v1.23.0","https://vuldb.com/?ctiid.277765"],"products":["micropython:micropython"],"source":"nvd","synced_at":"2026-10-19T21:54:38.012257375+00:00"},"epss":{"cve":"CVE-2024-8947","score":0.01029,"percentile":0.63707,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-pwwp-3q7j-9mx8","url":"https://osv.dev/vulnerability/GHSA-pwwp-3q7j-9mx8","summary":"Use After Free in MicroPython","modified":"2024-09-25T18:27:01.853486Z","packages":[{"ecosystem":"PyPI","name":"micropython-copy","purl":"pkg:pypi/micropython-copy","ranges":["<=3.3.3.post3"],"fixed":[]},{"ecosystem":"PyPI","name":"micropython-io","purl":"pkg:pypi/micropython-io","ranges":["<=0.1"],"fixed":[]}]},{"id":"PYSEC-2024-92","url":"https://osv.dev/vulnerability/PYSEC-2024-92","summary":"","modified":"2024-09-25T18:27:01.853486Z","packages":[{"ecosystem":"PyPI","name":"micropython-copy","purl":"pkg:pypi/micropython-copy","ranges":["all versions"],"fixed":[]}]},{"id":"PYSEC-2024-94","url":"https://osv.dev/vulnerability/PYSEC-2024-94","summary":"","modified":"2026-06-10T17:01:26.494949131Z","packages":[{"ecosystem":"PyPI","name":"micropython-io","purl":"pkg:pypi/micropython-io","ranges":["all versions"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}