# CVE-2023-42805: rust-quinn-proto: quinn-proto is a state machine for the QUIC transport protocol

CVE-2023-42805 is fixed in rust-quinn-proto on 1 platform, first by DEBIAN-CVE-2023-42805, released September 21, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-42805
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0094
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 21, 2023

## Description

quinn-proto is a state machine for the QUIC transport protocol. Prior to versions 0.9.5 and 0.10.5, receiving unknown QUIC frames in a QUIC packet could result in a panic. The problem has been fixed in 0.9.5 and 0.10.5 maintenance releases.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rust-quinn-proto Debian 13.5 (trixie) | 0.10.5-2 | [DEBIAN-CVE-2023-42805](https://patchblox.com/security/data/fix/linux/debian-cve-2023-42805.md) | Sep 21, 2023 |
| Linux | rust-quinn-proto Debian 14 | 0.10.5-2 | [DEBIAN-CVE-2023-42805](https://patchblox.com/security/data/fix/linux/debian-cve-2023-42805.md) | Sep 21, 2023 |

---

Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.