{"cve":"CVE-2023-6180","nvd":{"published":"2023-12-05T15:15:08.703","modified":"2026-06-17T06:50:15.297","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3},"cwes":["CWE-401","CWE-400","CWE-404"],"references":["https://github.com/cloudflare/boring/security/advisories/GHSA-pjrj-h4fg-6gm4","https://github.com/cloudflare/boring/security/advisories/GHSA-pjrj-h4fg-6gm4"],"products":["cloudflare:boring"],"source":"nvd","synced_at":"2026-10-19T21:42:34.585441961+00:00"},"epss":{"cve":"CVE-2023-6180","score":0.00619,"percentile":0.49666,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-pjrj-h4fg-6gm4","url":"https://osv.dev/vulnerability/GHSA-pjrj-h4fg-6gm4","summary":"tokio-boring vulnerable to resource exhaustion via memory leak","modified":"2026-07-08T06:29:08.895269677Z","packages":[{"ecosystem":"crates.io","name":"tokio-boring","purl":"pkg:cargo/tokio-boring","ranges":[">=4.0.0 <4.1.0"],"fixed":["4.1.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}