micropython up to 1.27.0 py/runtime.c mp_import_all memory corruption

Summaryinfo

A vulnerability was found in micropython up to 1.27.0. It has been declared as critical. This issue affects the function mp_import_all of the file py/runtime.c. Such manipulation leads to memory corruption. This vulnerability is documented as CVE-2026-1998. The attack needs to be performed locally. Additionally, an exploit exists. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in micropython up to 1.27.0. It has been rated as problematic. Affected by this issue is the function mp_import_all of the file py/runtime.c. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-1998. The exploitation is known to be easy. Local access is required to approach this attack. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 298197 (Linux Distros Unpatched Vulnerability : CVE-2026-1998), which helps to determine the existence of the flaw in a target environment.

Applying the patch 570744d06c5ba9dba59b4c3f432ca4f0abd396b6 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (298197). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Programming Language Software

Name

• micropython

Version

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

License

• open-source

Website

• Product: https://github.com/micropython/micropython/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

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• 🔒
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Exploitinginfo

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Entryinfo

Submitinfo

Accepted

• Submit #743396: micropython 0fd0843 Memory Corruption (by Oneafter)

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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