What’s Vulnerable › Vulnerabilities

CVE-2019-15541

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-08-26 · updated 2026-06-17
• Weakness: CWE-88

Description

rustls-mio/examples/tlsserver.rs in the rustls crate before 0.16.0 for Rust allows attackers to cause a denial of service (loop of conn_event and ready) by arranging for a client to never be writable.

Affected products

• Rustls Project Rustls: before 0.16.0 — fixed in 0.16.0

How to fix

Upgrade to a fixed version: Rustls Project Rustls 0.16.0. Check the vendor advisory for mitigations.

References

• https://github.com/ctz/rustls/commit/a93ee1abd2ab19ebe4bf9d684d56637ee54a6074
• https://github.com/ctz/rustls/compare/cd66549...17ee52c
• https://github.com/ctz/rustls/issues/285
• https://github.com/ctz/rustls/commit/a93ee1abd2ab19ebe4bf9d684d56637ee54a6074
• https://github.com/ctz/rustls/compare/cd66549...17ee52c
• https://github.com/ctz/rustls/issues/285

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