Skip to content
Fencer Vulns
medium 5.5

CVE-2025-66866 json

An issue was discovered in function d_abi_tags in file cp-demangle.c in BinUtils 2.26 allows attackers to cause a denial of service via cra…

published 2025-12-29 10 mo ago modified 2026-10-13 27 d ago also EUVD-2025-205615

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

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

Patch / fix

  • binutils hummingbird 1 2.45.1-5.hum1
  • binutils-gold hummingbird 1 2.45.1-5.hum1
  • binutils-gprofng hummingbird 1 2.45.1-5.hum1

red hat advisories RHSA-2026:7098

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-66866 updated cvss 3.3

binutils: BinUtils: Denial of Service via crafted PE file

  • Red Hat Enterprise Linux 6 binutils Red Hat Enterprise Linux 7 gdb, binutils, gdb-gdbserver Red Hat Enterprise Linux 8 gdb, binutils, gdb-headless, gdb-gdbserver, mingw-binutils, mingw32-binutils, +10 more Red Hat Enterprise Linux 9 gdb, binutils, gdb-minimal, gdb-headless, binutils-gold, gdb-gdbserver, +10 more Red Hat Enterprise Linux 10 gdb, binutils, mingw-binutils, mingw32-binutils, mingw64-binutils, gcc-toolset-15-binutils Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-dashboard-rhel9
    under investigation
  • Red Hat Hardened Images binutils 2.45.1-5.hum1, binutils-gold 2.45.1-5.hum1, binutils-gprofng 2.45.1-5.hum1
    fixed: vendor fix RHSA-2026:7098

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
10 mo ago

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/caozhzh/CRGF-Vul/blob/main/cxxfilt/crash6.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.