onyx

onyx --cves cve-2025-62409

CVE-2025-62409

HIGHEnvoy Proxy
score
<0.1
cvss
7.5
epss
0.5%
published
2025-10-16
kev added
—
first seen

Envoy < 1.36.1, 1.35.5, 1.34.9, and 1.33.10 contains a denial of service caused by a nullptr reference in buffer watermark callback during flow control in TCP connection pool, letting attackers crash the proxy, exploit requires sending large requests or responses while connection is closing.

Timeline

How this CVE moved toward exploitation. Chart: last 30 days — trend score, EPSS, community mentions per day; hover the event lane.

events2025-10-16 — PublishedP2026-10-21 (seen by) — Tracked by OnyxTscore2026-10-21: score <0.1<0.1epss2026-09-22: epss 0.5%2026-09-23: epss 0.5%2026-09-24: epss 0.5%2026-09-25: epss 0.5%2026-09-26: epss 0.5%2026-09-27: epss 0.5%2026-09-29: epss 0.5%2026-09-30: epss 0.5%2026-10-01: epss 0.5%2026-10-02: epss 0.5%2026-10-03: epss 0.5%2026-10-04: epss 0.5%2026-10-05: epss 0.5%2026-10-06: epss 0.5%2026-10-07: epss 0.5%2026-10-08: epss 0.5%2026-10-09: epss 0.5%2026-10-10: epss 0.5%2026-10-11: epss 0.5%2026-10-12: epss 0.5%2026-10-13: epss 0.5%2026-10-14: epss 0.5%2026-10-15: epss 0.5%2026-10-16: epss 0.5%2026-10-18: epss 0.5%2026-10-19: epss 0.5%2026-10-20: epss 0.5%2026-10-21: epss 0.5%0.5%mentions/day0no mentions in 30 days2026-09-22today
  1. Published
  2. Tracked by Onyx

Weaknesses

CWE-476

References 1