CVE-2025-66863 Denial of service in n/a
Attackers can cause a denial of service in BinUtils by providing a crafted PE file to the demangler function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-66863?
CVE-2025-66863 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_discriminator in file cp-demangle.c in BinUtils 2.26 allows attackers to cause a denial of service via crafted PE file.
Weakness: CWE-400
Which versions are affected by CVE-2025-66863?
It affects 1 product.
Products include Gnu Binutils.
How do I fix CVE-2025-66863?
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-2025-66863 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-66863 exists.
Other vulnerabilities in Gnu Binutils
Sources
Also known as DEBIAN-CVE-2025-66863, ECHO-b818-3789-a933, GHSA-vphr-3984-5c8w, UBUNTU-CVE-2025-66863.