#VU122239 Use-after-free in OpenBSD
Published: February 2, 2026
Vulnerability identifier: #VU122239
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
OpenBSD
OpenBSD
Software vendor:
OpenBSD
OpenBSD
Description
The vulnerability allows a remote attacker to perform a denial of service attack.
The vulnerability exists due to a use-after-free error when handling HTTP requests with chuncked encoding in server_http.c within httpd(8). A remote non-authenticated attacker can send a specially crafted HTTP request and perform a denial of service attack.
Remediation
Install updates from vendor's website.