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CVE-2024-11738 — rustls network-reachable panic in rustls — CVE...

MEDIUM

rustls network-reachable panic in `Acceptor::accept`

Published November 25, 2024Updated September 10, 2026Source: osv

Summary

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 Timeline

  • First published November 25, 2024 (686 days ago).
  • Last revised September 10, 2026 — 653 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo
Update rustls to 0.23.18 or later
cargo update -p rustls --precise 0.23.18

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

PackageEcosystemAffectedFixed In
rustls
crates.io
All versions0.23.18

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.0 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
—
Confidentiality
—
Integrity
—
Availability
—

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P

References

Frequently Asked Questions

What is CVE-2024-11738?
rustls network-reachable panic in `Acceptor::accept` This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 7.0/10).
How do I check if my project is affected by CVE-2024-11738?
CVE-2024-11738 affects rustls. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2024-11738 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.0

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-qg5g-gv98-5ffh
RUSTSEC-2024-0399

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More crates.io advisories

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