micropython runtime.c mp_import_all memory corruption_CVE-2026-1998

4.8 / 10

MEDIUM

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

Description

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.

Basic Information

ID CVE-2026-1998

Source VulDB

Published Feb 6, 2026 at 06:02

Affected Product

Vendor n/a

Product micropython

Version 1.0

Affected Versions n/a micropython 1.0
n/a micropython 1.1
n/a micropython 1.2
n/a micropython 1.3
n/a micropython 1.4
n/a micropython 1.5
n/a micropython 1.6
n/a micropython 1.7
n/a micropython 1.8
n/a micropython 1.9
n/a micropython 1.10
n/a micropython 1.11
n/a micropython 1.12
n/a micropython 1.13
n/a micropython 1.14
n/a micropython 1.15
n/a micropython 1.16
n/a micropython 1.17
n/a micropython 1.18
n/a micropython 1.19
n/a micropython 1.20
n/a micropython 1.21
n/a micropython 1.22
n/a micropython 1.23
n/a micropython 1.24
n/a micropython 1.25
n/a micropython 1.26
n/a micropython 1.27.0

CWE Classification

CWE-119

References

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    "lastseen": "",
    "description": "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.",
    "published": "2026-02-06T06:02:08.671Z",
    "modified": "2026-02-06T06:02:08.671Z",
    "type": "cve",
    "title": "micropython runtime.c mp_import_all memory corruption",
    "source": "VulDB",
    "references": "https://vuldb.com/?id.344546\nhttps://vuldb.com/?ctiid.344546\nhttps://vuldb.com/?submit.743396\nhttps://github.com/micropython/micropython/issues/18639\nhttps://github.com/micropython/micropython/pull/18671\nhttps://github.com/micropython/micropython/issues/18639#issue-3780651410\nhttps://github.com/dpgeorge/micropython/commit/570744d06c5ba9dba59b4c3f432ca4f0abd396b6\nhttps://github.com/micropython/micropython/",
    "id": "CVE-2026-1998",
    "bulletinFamily": "",
    "cwe": [
        "CWE-119"
    ],
    "cvelist": null,
    "sourceData": "n/a micropython 1.0\nn/a micropython 1.1\nn/a micropython 1.2\nn/a micropython 1.3\nn/a micropython 1.4\nn/a micropython 1.5\nn/a micropython 1.6\nn/a micropython 1.7\nn/a micropython 1.8\nn/a micropython 1.9\nn/a micropython 1.10\nn/a micropython 1.11\nn/a micropython 1.12\nn/a micropython 1.13\nn/a micropython 1.14\nn/a micropython 1.15\nn/a micropython 1.16\nn/a micropython 1.17\nn/a micropython 1.18\nn/a micropython 1.19\nn/a micropython 1.20\nn/a micropython 1.21\nn/a micropython 1.22\nn/a micropython 1.23\nn/a micropython 1.24\nn/a micropython 1.25\nn/a micropython 1.26\nn/a micropython 1.27.0",
    "sourceHref": "",
    "cvss": {
        "score": 4.8,
        "severity": "MEDIUM",
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    "href": "",
    "category_name": "CVE",
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    "product": "micropython",
    "version": "1.0",
    "vendor": "n/a",
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}