CVE-2024-1410 Unbounded storage of information related to connection ID retirement, in quiche

What is CVE-2024-1410?

CVE-2024-1410 is a low-severity denial of service vulnerability in Cloudflare quiche, published on 12 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Cloudflare quiche was discovered to be vulnerable to unbounded storage of information related to connection ID retirement, which could lead to excessive resource consumption. Each QUIC connection possesses a set of connection Identifiers (IDs); see RFC 9000 Section 5.1 https://datatracker.ietf.org/doc/html/rfc9000#section-5.1 . Endpoints declare the number of active connection IDs they are willing to support using the active_connection_id_limit transport parameter. The peer can create new IDs using a NEW_CONNECTION_ID frame but must stay within the active ID limit. This is done by retirement of old IDs, the endpoint sends NEW_CONNECTION_ID includes a value in the retire_prior_to field, which elicits a RETIRE_CONNECTION_ID frame as confirmation. An unauthenticated remote attacker can exploit the vulnerability by sending NEW_CONNECTION_ID frames and manipulating the connection (e.g. by restricting the peer's congestion window size) so that RETIRE_CONNECTION_ID frames can only be sent at a slower rate than they are received, leading to storage of information related to connection IDs in an unbounded queue. Quiche versions 0.19.2 and 0.20.1 are the earliest to address this problem. There is no workaround for affected versions.

Weakness: CWE-400

Which versions are affected by CVE-2024-1410?

4 open source packages ship an affected version, including quiche. It affects 1 product.

Products include Cloudflare Quiche.

How do I fix CVE-2024-1410?

Upgrade quiche to a fixed version for your release line: 0.19.2 or 0.20.1.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2024-1410 being exploited?

There is no known exploitation of CVE-2024-1410 in the wild and no public exploit code.

Other vulnerabilities in Cloudflare quiche

• CVE-2025-7054 Infinite loop triggered by connection ID retirement High 8.7
• CVE-2026-12523 Resource exhaustion in quiche HTTP/3 and QPACK layers High 7.5
• CVE-2025-4821 Incorrect congestion window growth by invalid ACK ranges High 7.5
• CVE-2024-1765 Unlimited resource allocation by QUIC CRYPTO frames flooding in quiche Medium 5.9
• CVE-2025-4820 Incorrect congestion window growth by optimistic ACK Medium 5.3

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-xhg9-xwch-vr7x.