Out-of-bounds write in Zlib - CVE-2026-22184
Published: February 19, 2026
Vulnerability identifier: #VU123089
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-22184
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GNU
Affected software:
Zlib
Zlib
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input within the TGZfname() function. A remote attacker can trick the victim into opening a specially crafted file, trigger an out-of-bounds write and execute arbitrary code on the target system.
How to mitigate CVE-2026-22184
Install updates from vendor's website.