CVE-2025-66866

An issue was discovered in function d_abi_tags in file cp-demangle.c in BinUtils 2.26 allows...

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.31%Up 0.3 points since Dec 30, 2025

What each source reports

NVD Score used 7.5

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.

Record: CVE-2025-66866
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-20
Updated: 2026-11-02

CVE List 5.5

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.

Record: CVE-2025-66866
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-20
Updated: 2026-11-02

EUVDEUVD-2025-205615 5.5

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.

Record: EUVD-2025-205615
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-gjrj-58f4-pgrh 5.5

An issue was discovered in function d_abi_tags in file cp-demangle.c in BinUtils 2.26 allows...

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.

Record: GHSA-gjrj-58f4-pgrh
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-20
Updated: 2026-11-02

OSVBELL-CVE-2025-66866 7.5

CVE-2025-66866 does not affect BellSoft software

Record: BELL-CVE-2025-66866
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSV 5.5

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.

Record: CVE-2025-66866
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Show 4 moreShow less

OSVDEBIAN-CVE-2025-66866 7.5

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.

Record: DEBIAN-CVE-2025-66866
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVRHSA-2026:7098 5.3

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record: RHSA-2026:7098
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Updated: 2026-11-02

OSVROOT-OS-DEBIAN-12-CVE-2025-66866 7.5

CVE-2025-66866 in binutils - Patched by Root

Root has patched CVE-2025-66866 in the binutils package for Root:Debian:12. Multiple fixed versions available.

Record: ROOT-OS-DEBIAN-12-CVE-2025-66866
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2025-66866 5.5

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.

Record: UBUNTU-CVE-2025-66866
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

gnu binutils

Affected packages

Affected packages
Package	Affected	Fixed
`binutils` Debian:12	All versions, plus listed versions 2.40-22.40.50.20230111-12.40.50.20230215-12.40.50.20230501-12.40.50.20230510-1 Show 45 moreShow less 2.40.50.20230602-12.40.50.20230611-12.40.50.20230611-22.40.50.20230622-12.40.50.20230625-12.40.50.20230630-12.40.90.20230705-12.40.90.20230714-12.40.90.20230714-22.40.90.20230720-12.40.90.20230729-12.40.90.20230729-22.41-12.41-22.41-32.41-42.41-52.41-62.41-72.41.50.20230731-12.41.50.20230803-12.41.50.20230905-12.41.50.20231010-12.41.50.20231101-12.41.50.20231125-12.41.50.20231202-12.41.50.20231206-12.41.50.20231214-12.41.50.20231227-12.41.90.20240115-12.41.90.20240122-12.42-12.42-22.42-2+hurd.12.42-32.42-42.42.50.20240614-12.42.50.20240618-12.42.50.20240625-12.42.50.20240710-12.42.90.20240720-12.42.90.20240720-22.43-12.43-22.43.1-1	None known
`binutils` Debian:13	All versions, plus listed versions 2.44-32.44.50.20250201-12.44.50.20250207-12.44.50.20250218-12.44.50.20250218-2 Show 45 moreShow less 2.44.50.20250309-12.44.50.20250405-12.44.50.20250502-12.44.50.20250520-12.44.50.20250528-12.44.50.20250707-12.44.90.20250719-12.45-12.45-22.45-32.45-42.45-52.45-62.45-72.45-82.45.50.20250813-12.45.50.20250903-12.45.50.20251005-12.45.50.20251023-12.45.50.20251023-22.45.50.20251122-12.45.50.20251125-12.45.50.20251201-12.45.50.20251209-12.45.50.20260116-12.45.50.20260119-12.45.90.20260125-12.45.90.20260201-12.46-12.46-22.46-32.46.50.20260216-12.46.50.20260509-12.46.50.20260519-12.46.50.20260608-12.46.50.20260617-12.46.90.20260712-12.47-12.47-22.47-32.47-42.47-52.47-62.47.50.20260813-12.47.50.20260813-2	None known
`binutils` Debian:14	All versions, plus listed versions 2.44-32.44.50.20250201-12.44.50.20250207-12.44.50.20250218-12.44.50.20250218-2 Show 45 moreShow less 2.44.50.20250309-12.44.50.20250405-12.44.50.20250502-12.44.50.20250520-12.44.50.20250528-12.44.50.20250707-12.44.90.20250719-12.45-12.45-22.45-32.45-42.45-52.45-62.45-72.45-82.45.50.20250813-12.45.50.20250903-12.45.50.20251005-12.45.50.20251023-12.45.50.20251023-22.45.50.20251122-12.45.50.20251125-12.45.50.20251201-12.45.50.20251209-12.45.50.20260116-12.45.50.20260119-12.45.90.20260125-12.45.90.20260201-12.46-12.46-22.46-32.46.50.20260216-12.46.50.20260509-12.46.50.20260519-12.46.50.20260608-12.46.50.20260617-12.46.90.20260712-12.47-12.47-22.47-32.47-42.47-52.47-62.47.50.20260813-12.47.50.20260813-2	None known
`binutils` Red Hat:hummingbird:1 From an advisory covering 25 CVEs	before 0:2.45.1-5.hum1	0:2.45.1-5.hum1
`binutils-devel` Red Hat:hummingbird:1 From an advisory covering 25 CVEs	before 0:2.45.1-5.hum1	0:2.45.1-5.hum1
`binutils-gold` Red Hat:hummingbird:1 From an advisory covering 25 CVEs	before 0:2.45.1-5.hum1	0:2.45.1-5.hum1
`binutils-gprofng` Red Hat:hummingbird:1 From an advisory covering 25 CVEs	before 0:2.45.1-5.hum1	0:2.45.1-5.hum1
`binutils` Root:Debian:12	before 2.40-2.root.io.19	2.40-2.root.io.192.40-2.root.io.202.40-2.root.io.212.40-2.root.io.222.40-2.root.io.232.40-2.root.io.242.40-2.aikido.25
`rootio-binutils` Root:Debian:12	before 2.40-2.root.io.19	2.40-2.root.io.192.40-2.root.io.202.40-2.root.io.212.40-2.root.io.222.40-2.root.io.232.40-2.root.io.242.40-2.aikido.25
`binutils` Ubuntu:Pro:14.04:LTS	All versions, plus listed versions 2.23.52.20130913-0ubuntu12.23.90.20131017-1ubuntu12.23.90.20131116-1ubuntu12.23.91.20131123-1ubuntu12.24-1ubuntu1 Show 20 moreShow less 2.24-1ubuntu22.24-2ubuntu12.24-2ubuntu22.24-2ubuntu32.24-4ubuntu12.24-5ubuntu12.24-5ubuntu22.24-5ubuntu32.24-5ubuntu3.12.24-5ubuntu132.24-5ubuntu142.24-5ubuntu14.12.24-5ubuntu14.22.24-5ubuntu14.2+esm12.24-5ubuntu14.2+esm22.24-5ubuntu14.2+esm32.24-5ubuntu14.2+esm52.24-5ubuntu14.2+esm62.24-5ubuntu14.2+esm72.24-5ubuntu14.2+esm8	None known

Show 8 moreShow less

Affected packages
Package	Affected	Fixed
`binutils` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 2.25.1-6ubuntu12.25.51.20151022-0ubuntu22.25.51.20151022-0ubuntu32.25.51.20151027-0ubuntu12.25.51.20151028-0ubuntu1 Show 37 moreShow less 2.25.51.20151106-0ubuntu12.25.51.20151113-1ubuntu12.25.51.20151113-2ubuntu12.25.90.20151125-1ubuntu12.25.90.20151125-2ubuntu12.25.90.20151211-0ubuntu12.25.90.20151211-0ubuntu22.25.90.20160101-1ubuntu12.25.90.20160101-1ubuntu22.26-2ubuntu12.26-3ubuntu12.26-4ubuntu12.26-5ubuntu12.26-6ubuntu12.26-7ubuntu22.26-8ubuntu12.26-8ubuntu22.26-8ubuntu2.12.26.1-1ubuntu1~16.042.26.1-1ubuntu1~16.04.12.26.1-1ubuntu1~16.04.32.26.1-1ubuntu1~16.04.42.26.1-1ubuntu1~16.04.52.26.1-1ubuntu1~16.04.62.26.1-1ubuntu1~16.04.72.26.1-1ubuntu1~16.04.82.26.1-1ubuntu1~16.04.8+esm12.26.1-1ubuntu1~16.04.8+esm32.26.1-1ubuntu1~16.04.8+esm42.26.1-1ubuntu1~16.04.8+esm52.26.1-1ubuntu1~16.04.8+esm62.26.1-1ubuntu1~16.04.8+esm72.26.1-1ubuntu1~16.04.8+esm92.26.1-1ubuntu1~16.04.8+esm112.26.1-1ubuntu1~16.04.8+esm122.26.1-1ubuntu1~16.04.8+esm132.26.1-1ubuntu1~16.04.8+esm14	None known
`binutils` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 2.29.1-4ubuntu12.29.1-6ubuntu12.29.1-7ubuntu12.29.1-8ubuntu12.29.1-10ubuntu1 Show 25 moreShow less 2.29.1-12ubuntu12.30-4ubuntu12.30-5ubuntu12.30-7ubuntu12.30-8ubuntu12.30-9ubuntu12.30-10ubuntu12.30-11ubuntu12.30-14ubuntu22.30-15ubuntu12.30-20ubuntu2~18.042.30-21ubuntu1~18.042.30-21ubuntu1~18.04.12.30-21ubuntu1~18.04.22.30-21ubuntu1~18.04.32.30-21ubuntu1~18.04.42.30-21ubuntu1~18.04.52.30-21ubuntu1~18.04.72.30-21ubuntu1~18.04.82.30-21ubuntu1~18.04.92.30-21ubuntu1~18.04.9+esm12.30-21ubuntu1~18.04.9+esm32.30-21ubuntu1~18.04.9+esm42.30-21ubuntu1~18.04.9+esm52.30-21ubuntu1~18.04.9+esm13	None known
`binutils` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 2.33-2ubuntu12.33.1-1ubuntu12.33.1-5ubuntu12.33.1-6ubuntu12.33.1-6ubuntu3 Show 18 moreShow less 2.33.90.20200122-1ubuntu22.34-1ubuntu12.34-3ubuntu12.34-4ubuntu12.34-5ubuntu12.34-6ubuntu12.34-6ubuntu1.12.34-6ubuntu1.32.34-6ubuntu1.42.34-6ubuntu1.52.34-6ubuntu1.62.34-6ubuntu1.72.34-6ubuntu1.82.34-6ubuntu1.92.34-6ubuntu1.102.34-6ubuntu1.112.34-6ubuntu1.11+esm12.34-6ubuntu1.11+esm2	None known
`binutils` Ubuntu:22.04:LTS	All versions, plus listed versions 2.37-7ubuntu12.37-9ubuntu12.37-10ubuntu12.37.50.20220106-2ubuntu12.37.90.20220126-0ubuntu1 Show 16 moreShow less 2.37.90.20220130-0ubuntu22.38-1ubuntu12.38-2ubuntu12.38-3ubuntu12.38-4ubuntu22.38-4ubuntu2.12.38-4ubuntu2.22.38-4ubuntu2.32.38-4ubuntu2.42.38-4ubuntu2.52.38-4ubuntu2.62.38-4ubuntu2.72.38-4ubuntu2.82.38-4ubuntu2.102.38-4ubuntu2.112.38-4ubuntu2.12	None known
`binutils` Ubuntu:24.04:LTS	All versions, plus listed versions 2.41-5ubuntu12.41-6ubuntu12.41.50.20231206-1ubuntu12.41.50.20231214-1ubuntu12.41.50.20231227-1ubuntu1 Show 12 moreShow less 2.41.90.20240122-1ubuntu12.42-2ubuntu12.42-3ubuntu12.42-4ubuntu12.42-4ubuntu22.42-4ubuntu2.32.42-4ubuntu2.42.42-4ubuntu2.52.42-4ubuntu2.62.42-4ubuntu2.72.42-4ubuntu2.82.42-4ubuntu2.10	None known
`binutils` Ubuntu:25.10	All versions, plus listed versions 2.44-3ubuntu12.44.50.20250602-0ubuntu12.44.50.20250604-0ubuntu22.44.50.20250616-0ubuntu12.44.50.20250707-1ubuntu1 Show 6 moreShow less 2.45-1ubuntu12.45-3ubuntu32.45-6ubuntu12.45-7ubuntu12.45-7ubuntu1.12.45-7ubuntu1.2	None known
`binutils` Ubuntu:26.10	All versions, plus listed versions 2.46-3ubuntu22.46.50.20260608-1ubuntu12.47-2ubuntu12.47-6ubuntu1	None known
`binutils` Ubuntu:26.04:LTS	All versions, plus listed versions 2.45-7ubuntu12.45-7ubuntu22.45-8ubuntu12.45.50.20251125-1ubuntu12.45.50.20251201-1ubuntu1 Show 6 moreShow less 2.45.50.20251209-1ubuntu12.45.50.20260119-1ubuntu12.46-1ubuntu12.46-2ubuntu12.46-3ubuntu12.46-3ubuntu2	None known

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-66866 is a high vulnerability (CVSS 7.5) in Gnu Binutils, published December 29, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.31%, the 24th percentile. Fixed in binutils 2.40-2.root.io.19.

References

Show 175 moreShow less

This page doesn't list everything

Left out here: 83 versions. The JSON record has them.