IM
IronMonkey Threat Research

CVE-2026-22184 HIGH

Published: 2026-01-07 | Last Modified: 2026-07-15 | Status: Modified

Description

zlib versions up to and including 1.3.1.2 include a global buffer overflow in the untgz utility located under contrib/untgz. The vulnerability is limited to the standalone demonstration utility and does not affect the core zlib compression library. The flaw occurs when a user executes the untgz command with an excessively long archive name supplied via the command line, leading to an out-of-bounds write in a fixed-size global buffer.

Additional Descriptions (1)

Las versiones de zlib hasta la 1.3.1.2 inclusive incluyen un desbordamiento de búfer global en la utilidad untgz ubicada en contrib/untgz. La vulnerabilidad se limita a la utilidad de demostración independiente y no afecta a la biblioteca de compresión central de zlib. El fallo ocurre cuando un usuario ejecuta el comando untgz con un nombre de archivo excesivamente largo suministrado a través de la línea de comandos, lo que lleva a una escritura fuera de límites en un búfer global de tamaño fijo.

CVSS Metrics

Base Score: 7.8 (HIGH)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack VectorLOCAL
Attack ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
Confidentiality ImpactHIGH
Integrity ImpactHIGH
Availability ImpactHIGH

Source: [email protected]

Type: Primary

Exploitability Score: 1.8

Impact Score: 5.9

Base Score: 4.6 (MEDIUM)

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/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

Attack VectorLOCAL
Attack ComplexityLOW
Attack RequirementsNONE
Privileges RequiredNONE
User InteractionACTIVE
Vulnerability ConfidentialityLOW
Vulnerability IntegrityNONE
Vulnerability AvailabilityLOW
Subsequent ConfidentialityNONE
Subsequent IntegrityNONE
Subsequent AvailabilityNONE

Source: [email protected]

Type: Secondary

Weaknesses

Source Type Description
[email protected] Secondary
en CWE-787
[email protected] Secondary
en CWE-787
0b0ca135-0b70-47e7-9f44-1890c2a1c46c Secondary
en CWE-120

Affected Products

Vendor Product Version Update Type
zlib zlib * <built-in method update of dict object at 0x702bde76ab40> Application

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:zlib:zlib:*:*:*:*:*:*:*:*

References

Notification
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