CVE-2025-66865 Denial of service in n/a

What is CVE-2025-66865?

CVE-2025-66865 is a high-severity denial of service vulnerability in Gnu Binutils, published on 29 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in function d_print_comp_inner in file cp-demangle.c in BinUtils 2.26 allows attackers to cause a denial of service via crafted PE file.

Weakness: CWE-121

Which versions are affected by CVE-2025-66865?

It affects 1 product.

Products include Gnu Binutils.

How do I fix CVE-2025-66865?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-66865 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-66865 exists.

Other vulnerabilities in Gnu Binutils

• CVE-2017-7614 Null dereference in n/a Critical 9.8
• CVE-2014-9939 Memory corruption in n/a Critical 9.8
• CVE-2017-7226 Information disclosure in n/a Critical 9.1
• CVE-2017-6969 Information disclosure in n/a Critical 9.1
• CVE-2020-19726 Denial of service in n/a High 8.8

All Gnu Binutils vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2025-66865, ECHO-f200-77a9-2ba8, GHSA-w539-2pgj-g759, UBUNTU-CVE-2025-66865.