CVE-2025-66862: gnu binutils Heap-based Buffer Overflow

Vulnerability summary

CVE-2025-66862 is a high (CVSS 7.5) Heap-based Buffer Overflow vulnerability in gnu binutils. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.4% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 29-12-2025
   PublishedVulnerability first disclosed.
2. 30-12-2025
   Last modifiedVulnerability information updated.

Description

A buffer overflow vulnerability in function gnu_special in file cplus-dem.c in BinUtils 2.26 allows attackers to cause a denial of service via crafted PE file.

• 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().