NULL pointer dereference in envoy - CVE-2025-62409
Published: October 16, 2025
Vulnerability identifier: #VU117306
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2025-62409
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference when handling large requests and responses. A remote attacker can send specially crafted HTTP requests to the server and trigger TCP connection pool to crash.
Affected software
envoy
How to mitigate CVE-2025-62409
Install updates from vendor's website.
envoy - addressed in versions 1.33.10, 1.34.9, 1.35.5, 1.36.1