Use-after-free in envoy - CVE-2025-62504
Published: October 21, 2025
Vulnerability identifier: #VU117423
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-62504
CWE-ID: CWE-416
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 a use-after-free error in the proxy's Lua filter. A remote user can casue a denial of service condition on the target system.
Affected software
envoy
How to mitigate CVE-2025-62504
Install updates from vendor's website.
envoy - addressed in versions 1.33.12, 1.34.10, 1.35.6, 1.36.2