What’s Vulnerable › Vulnerabilities

CVE-2023-6180: Resource exhaustion via memory leak in tokio-boring

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-12-05 · updated 2026-06-17
• Weakness: CWE-400

Description

The tokio-boring library in version 4.0.0 is affected by a memory leak issue that can lead to excessive resource consumption and potential DoS by resource exhaustion. The set_ex_data function used by the library did not deallocate memory used by pre-existing data in memory each time after completing a TLS connection causing the program to consume more resources with each new connection.

Affected products

• Cloudflare tokio-boring: 4.0.0

References

• https://github.com/cloudflare/boring/security/advisories/GHSA-pjrj-h4fg-6gm4
• https://github.com/cloudflare/boring/security/advisories/GHSA-pjrj-h4fg-6gm4

Get alerted when CVE-2023-6180 or the next vulnerability affects your stack