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CVE-2024-8948 Details

Description

A vulnerability was found in MicroPython 1.23.0. It has been rated as critical. Affected by this issue is the function mpz_as_bytes of the file py/objint.c. The manipulation leads to heap-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The patch is identified as 908ab1ceca15ee6fd0ef82ca4cba770a3ec41894. It is recommended to apply a patch to fix this issue. In micropython objint component, converting zero from int to bytes leads to heap buffer-overflow-write at mpz_as_bytes.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:7.3 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/micropython/micropython/commit/908ab1ceca15ee6fd0ef82ca4cba770a3ec41894	[email protected]	Patch
https://github.com/micropython/micropython/issues/13041	[email protected]	ExploitIssue TrackingThird Party Advisory
https://vuldb.com/?ctiid.277766	[email protected]	Permissions Required
https://vuldb.com/?id.277766	[email protected]	Third Party Advisory
https://vuldb.com/?submit.409317	[email protected]	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-787	Out-of-bounds Write	[email protected]
CWE-122	Heap-based Buffer Overflow	[email protected]

Affected Products

Product	Versions
micropython micropython	1.23.0
CPE cpe:2.3:a:micropython:micropython:1.23.0:::::::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Sep 23, 2024	Initial Analysis	[email protected]
Sep 17, 2024	New CVE Received	[email protected]