Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://gist.github.com/Lucian-code233/04940a264cab50732cc07fd991749226
- https://github.com/ton-blockchain/ton/commit/9e5109d56bc4f2345a00b2271c371110384
- https://github.com/ton-blockchain/ton/releases/tag/v2025.06#:~:text=AArayz%2C%20
- https://mp.weixin.qq.com/s/IbRKrCKdMyIi-azkuqOOvg
- https://www.tonbit.xyz/blog/post/TonBit-Discovers-Critical-Vulnerability-on-TON-
FAQ
What is CVE-2025-70954?
CVE-2025-70954 is a vulnerability with a CVSS score of 7.5 (HIGH). 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, w...
How severe is CVE-2025-70954?
CVE-2025-70954 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-70954?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.