NULL pointer dereference in envoy - CVE-2025-62409
Published: October 16, 2025
Vulnerability identifier: #VU117306
CSH Severity: Medium
CVSS v4.0: 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: CVE-2025-62409
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cloud Native Computing Foundation
Affected software:
envoy
envoy
Detailed vulnerability description
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.
How to mitigate CVE-2025-62409
Install updates from vendor's website.