CVE-2025-4820

Impact Cloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support. An unauthenticated remote attacker can exploit the vulnerability by first completing a handshake and initiating ...

CVE-2025-4820

Impact Cloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support. An unauthenticated remote attacker can exploit the vulnerability by first completing a handshake and initiating ...

CVE-2025-4821

Impact Cloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support. An unauthenticated remote attacker can exploit the vulnerability by first completing a handshake and initiating ...

CVE-2025-4821 Incorrect congestion window growth by invalid ACK ranges

Impact Cloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support. An unauthenticated remote attacker can exploit the vulnerability by first completing a handshake and initiating ...

CVE-2025-4821 Incorrect congestion window growth by invalid ACK ranges

Impact Cloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support. An unauthenticated remote attacker can exploit the vulnerability by first completing a handshake and initiating ...

CVE-2025-4821

Impact Cloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support. An unauthenticated remote attacker can exploit the vulnerability by first completing a handshake and initiating ...

CVE-2025-4821 Incorrect congestion window growth by invalid ACK ranges

Impact Cloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support. An unauthenticated remote attacker can exploit the vulnerability by first completing a handshake and initiating ...

CVE-2025-4820

CVE-2025-4020 (CVE-2025-4820) affects the Cloudflare quiche library. The issue is an incorrect congestion window growth caused by an opportunistic ACK attack (RFC 9000, §21.4) that can allow a victim to send more data in flight than the path supports. An unauthenticated remote attacker can comple...

CVE-2025-4820 Incorrect congestion window growth by optimistic ACK

Impact Cloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support. An unauthenticated remote attacker can exploit the vulnerability by first completing a handshake and initiating ...

CVE-2025-4820 Incorrect congestion window growth by optimistic ACK

Impact Cloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support. An unauthenticated remote attacker can exploit the vulnerability by first completing a handshake and initiating ...

quiche 安全漏洞

quiche is a Cloudflare open source implementation of the IETF-designated QUIC transport protocol and HTTP/3. A security vulnerability exists in quiche that stems from an incorrect congestion window growth, which could result in sending data at a rate that exceeds the actual supported capacity of...

quiche -- Multiple vulnerabilities

Quiche Releases reports: This update includes 2 security fixes: Medium CVE-2025-4820: Incorrect congestion window growth by optimistic ACK. Reported by Louis Navarre on 2025-06-18. High CVE-2025-4821: Incorrect congestion window growth by invalid ACK ranges. Reported by Louis Navarre on 2025-06-1...

PT-2025-26173 · Quiche · Quiche

Name of the Vulnerable Software and Affected Versions: quiche versions prior to 0.24.4 Description: The issue is related to incorrect congestion window growth, which could cause quiche to send data at a rate faster than the path might actually support. An unauthenticated remote attacker can explo...