CVE-2026-110661

CGNS through 4.5.2 Stack Out-of-Bounds Read via ADFI_read_node_header

4.8 Medium

CGNS through 4.5.2 contains a stack out-of-bounds read vulnerability in ADFI_read_node_header that allows attackers to crash applications by supplying crafted ADF node headers. Attackers can craft .cgns or .adf files whose non-NUL-terminated end tag causes ADFI_stridx_c to scan past disk_node_data, crashing tools like cgnslist.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Passive

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: Low

Exploit likelihood

0.17%Unchanged since Oct 15, 2026

What each source reports

CVE List Score used 4.8

CGNS through 4.5.2 Stack Out-of-Bounds Read via ADFI_read_node_header

Record: CVE-2026-110661
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Weakness: CWE-125
Updated: 2026-11-09

EUVDEUVD-2026-101134 4.8

Record: EUVD-2026-101134
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Updated: 2026-11-09

GitHub AdvisoriesGHSA-c64r-37fg-rgvp 4.8

CGNS through 4.5.2 contains a stack out-of-bounds read vulnerability in ADFI_read_node_header...

Record: GHSA-c64r-37fg-rgvp
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Weakness: CWE-125
Updated: 2026-11-02

NVD 4.8

Record: CVE-2026-110661
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Weakness: CWE-125
Updated: 2026-11-09

OSV 4.8

CGNS through 4.5.2 Stack Out-of-Bounds Read via ADFI_read_node_header

Record: CVE-2026-110661
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Weakness: CWE-125
Updated: 2026-11-10

OSVUBUNTU-CVE-2026-110661 4.8

Record: UBUNTU-CVE-2026-110661
CVSS 4.0: 4.8 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS 3.1: 3.3 LowCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Updated: 2026-11-02

Affected products

cgns

Affected packages

Affected packages
Package	Affected	Fixed
`libcgns` Ubuntu:16.04:LTS	All versions, plus listed versions 3.1.4.2-2build2	None known
`libcgns` Ubuntu:18.04:LTS	All versions, plus listed versions 3.3.0-43.3.0-5	None known
`libcgns` Ubuntu:20.04:LTS	All versions, plus listed versions 3.3.0-6build23.3.0-73.4.0-1	None known
`libcgns` Ubuntu:22.04:LTS	All versions, plus listed versions 3.4.0-3	None known
`libcgns` Ubuntu:24.04:LTS	All versions, plus listed versions 3.4.0-33.4.0-3build13.4.0-4	None known
`libcgns` Ubuntu:26.10	All versions, plus listed versions 4.5.0-14.5.0-2	None known
`libcgns` Ubuntu:26.04:LTS	All versions, plus listed versions 3.4.0-5build14.5.0-1	None known

History

History
Recorded	Changed	Sources
Nov 9, 2026	facts	EUVD
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-2026-110661 is a medium vulnerability (CVSS 4.8) in Cgns, published October 14, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.17%, the 5th percentile. No source names a fixed version.