CVE-2025-70954
Unknown Unknown - Not Provided
Null Pointer Dereference in TON VM Causes Blockchain DoS

Publication date: 2026-02-13

Last updated on: 2026-02-17

Assigner: MITRE

Description
A Null Pointer Dereference vulnerability exists in the TON Virtual Machine (TVM) within the TON Blockchain before v2025.06. The issue is located in the execution logic of the INMSGPARAM instruction, where the program fails to validate if a specific pointer is null before accessing it. By sending a malicious transaction or smart contract, an attacker can trigger this null pointer dereference, causing the validator node process to crash (segmentation fault). This results in a Denial of Service (DoS) affecting the availability of the entire blockchain network.
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Meta Information
Published
2026-02-13
Last Modified
2026-02-17
Generated
2026-06-16
AI Q&A
2026-02-14
EPSS Evaluated
2026-06-15
NVD
CVE-2025-70954
EUVD
EUVD-2025-207528
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
ton_blockchain ton_virtual_machine to 2025.06 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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Executive Summary

This vulnerability is a Null Pointer Dereference in the TON Virtual Machine (TVM) within the TON Blockchain before version 2025.06. It occurs in the execution logic of the INMSGPARAM instruction, where the program does not check if a pointer is null before trying to access it.

An attacker can exploit this by sending a malicious transaction or smart contract that triggers this null pointer dereference, causing the validator node process to crash with a segmentation fault.

Impact Analysis

Exploiting this vulnerability causes the validator node process to crash, resulting in a Denial of Service (DoS).

This DoS affects the availability of the entire blockchain network, potentially disrupting services that rely on the TON Blockchain.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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