CVE-2026-1998 PUBLISHED

micropython runtime.c mp_import_all memory corruption

Assigner: VulDB
Reserved: 05.02.2026 Published: 06.02.2026 Updated: 06.02.2026

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.

CVSS Vector: 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
CVSS Score: 4.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	Low	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
CVSS Score: 3.3

Attack Vector	Local	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	Low

CVSS 3.1

CVSS Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
CVSS Score: 3.3

Attack Vector	Local	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	Low

CVSS 3.0

CVSS Vector: AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C
CVSS Score: 1.7

Access Vector	Local	Confidentiality Impact	None
Access Complexity	Low	Integrity Impact	None
Authentication	Single	Availability Impact	Partial

CVSS 2.0

Product Status

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

CVE-2026-1998 PUBLISHED

micropython runtime.c mp_import_all memory corruption

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Product Status

Credits

References

Problem Types