CVE-2024-36843: libmodbus Heap-based Buffer Overflow

Vulnerability summary

CVE-2024-36843 is a high (CVSS 7.5) Heap-based Buffer Overflow vulnerability in libmodbus. EPSS estimates a 0.79% chance of exploitation in the next 30 days, higher than 55.5% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 31-05-2024
   PublishedVulnerability first disclosed.
2. 03-11-2025
   Last modifiedVulnerability information updated.

Description

libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function.

• CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().