Resource exhaustion via memory leak in tokio-boring
Priority LOW 25CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.
Summary
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.
Why it matters now
EPSS 0.00619 49th percentileScored 2026-11-07
Fix Fixed tokio-boring (crates.io): 4.1.0
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cloudflare | tokio-boring | 4.0.0 – 4.1.0 | — | No fix listed | CNA |
| — | tokio-boring (crates.io) | 4.0.0 to before 4.1.0 | 4.1.0 | Patch available | GHSA-pjrj-h4fg-6gm4 |
- tokio-boring VendorCloudflare Affected 4.0.0 – 4.1.0 Fixed in — No fix listed CNA
- tokio-boring (crates.io) Vendor— Affected 4.0.0 to before 4.1.0 Fixed in 4.1.0 Patch available GHSA-pjrj-h4fg-6gm4
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cloudflare:boring:4.0.0:*:*:*:*:rust:*:* | 4.0.0 | Vulnerable | Cloudflare |
- cpe:2.3:a:cloudflare:boring:4.0.0:*:*:*:*:rust:*:* Versions 4.0.0 Vulnerable ·Cloudflare
Remediation
- Fix · GHSA-pjrj-h4fg-6gm4 tokio-boring (crates.io) Fixed in 4.1.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2023-6180
- 2026-10-03 Alias added: GHSA-pjrj-h4fg-6gm4
References
Sources
- CVE-2023-6180 · CVE Program
- CVE-2023-6180 · NVD
- FIRST EPSS
- GHSA-pjrj-h4fg-6gm4 · GitHub Advisory Database · CC BY 4.0
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