Reported

November 22, 2024

Issued

November 25, 2024 (last modified: October 28, 2025)

Package

rustls (crates.io)

Type

Vulnerability

Categories

• denial-of-service

Aliases

• CVE-2024-11738
• GHSA-qg5g-gv98-5ffh

References

• https://github.com/rustls/rustls/issues/2227

Patched

• >=0.23.18

Unaffected

• >=0.23, <0.23.13
• <0.23

Description

A bug introduced in rustls 0.23.13 leads to a panic if the received TLS ClientHello is fragmented. Only servers that use rustls::server::Acceptor::accept() are affected.

Servers that use tokio-rustls's LazyConfigAcceptor API are affected.

Servers that use tokio-rustls's TlsAcceptor API are not affected.

Servers that use rustls-ffi's rustls_acceptor_accept API are affected.

Advisory available under CC0-1.0 license.