CVE-2025-4821

CVE-2025-4821 affects Cloudflare’s quiche (QUIC) prior to 0.24.4. The issue is “Incorrect congestion window growth” caused by processing invalid ACK ranges. An unauthenticated remote attacker can complete a handshake, initiate a congestion-controlled transfer, and send ACK frames covering a large...

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

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 ...

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 ...

AZL-70409 CVE-2022-50116 affecting package kernel 5.15.200.1-1

In the Linux kernel, the following vulnerability has been resolved: tty: ngsm: fix deadlock and link starvation in outgoing data path The current implementation queues up new control and user packets as needed and processes this queue down to the ldisc in the same code path. That means that the...

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 improperly growing congestion window that could cause data to be sent at a rate that exceeds the path support capability...

PT-2025-26172 · 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...

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...

Unraveling Ethereum'S Mempool: the Impact of Fee Fairness, Transaction Prioritization, and Consensus Efficiency

Ethereum's transaction pool mempool dynamics and fee market efficiency critically affect transaction inclusion, validator workload, and overall network performance. This research empirically analyzes gas price variations, mempool clearance rates, and block finalization times in Ethereum's...

The vulnerability of the dccp_feat_change_recv() function in the net/dccp/feat.c module of the Linux kernel allows a hacker to cause a service failure.

The vulnerability of the dccpfeatchangerecv function in the net/dccp/feat.c module of the Linux kernel is related to the lack of memory release after the effective lifespan has ended. Exploiting this vulnerability could allow an attacker to cause a service failure...

A Framework for Combined Transaction Posting and Pricing for Layer 2 Blockchains

This paper presents a comprehensive framework for transaction posting and pricing in Layer 2 L2 blockchain systems, focusing on challenges stemming from fluctuating Layer 1 L1 gas fees and the congestion issues within L2 networks. Existing methods have focused on the problem of optimal posting...

CVE-2019-6677

On BIG-IP versions 15.0.0-15.0.1, 14.1.0-14.1.2, 14.0.0-14.0.1, 13.1.0-13.1.3.1, and 12.1.0-12.1.5, under certain conditions when using custom TCP congestion control settings in a TCP profile, TMM stops processing traffic when processed by an iRule...

SUSE CVE-2022-49775

In the Linux kernel, the following vulnerability has been resolved: tcp: cdg: allow tcpcdgrelease to be called multiple times Apparently, mptcp is able to call tcpdisconnect on an already disconnected flow. This is generally fine, unless current congestion control is CDG, because it might trigger...

DEBIAN-CVE-2022-49775

In the Linux kernel, the following vulnerability has been resolved: tcp: cdg: allow tcpcdgrelease to be called multiple times Apparently, mptcp is able to call tcpdisconnect on an already disconnected flow. This is generally fine, unless current congestion control is CDG, because it might trigger...