SB2021082435 - Buffer overflow in go-ethereum
Published: August 24, 2021 Updated: April 27, 2026
Security Bulletin ID
SB2021082435
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Buffer overflow (CVE-ID: CVE-2021-39137)
The vulnerability allows a remote attacker to cause a consensus error.
The vulnerability exists due to memory corruption in the Geth EVM when processing a maliciously crafted transaction. A remote attacker can send a maliciously crafted transaction to cause a consensus error.
Successful exploitation can cause vulnerable nodes to compute a different stateRoot and reject the canonical chain, potentially splitting the chain into two forks.
Remediation
Install update from vendor's website.