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No exploitation reportedFix available

CVE-2023-42805

No exploitation reported by the sources we read.

  • Published2023-09-21
  • Fixed in0.10.5 · 0.9.5
  • WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2023-09-2117:15CVE publishedNVD

Versions per branch

NVD · CISA-ADP · OSV
Quinn project quinn
BranchAffectedFixed in
0.10≥ 0.10.0, < 0.10.50.10.5
0.10≥ 0.10.0-0, < 0.10.50.10.5
0.9< 0.9.50.9.5
0.x≥ 0.0.0-0, < 0.9.50.9.5

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • quinn-rs quinn
    Affected
    • = < 0.9.5no fix stated
    • = >= 0.10.0, < 0.10.5no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-09-21

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • rust-quinn-protoUbuntu:26.10all versions · no fixed version listed
  • rust-quinn-protoUbuntu:26.04:LTSall versions · no fixed version listed
  • rust-quinn-protoUbuntu:25.10all versions · no fixed version listed
  • rust-quinn-protoUbuntu:24.04:LTSall versions · no fixed version listed
  • rust-quinn-protoDebian:14all versions · fixed in 0.10.5-2
  • rust-quinn-protoDebian:13all versions · fixed in 0.10.5-2
  • rust-quinn-protoDebian:12all versions · no fixed version listed

Full record on NVD

Fix

  1. Update Quinn project quinn to 0.10.5 · 0.9.5

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionnone2024-09-24
  • CNACVSS 3.17.5known since 2026-10-23
  • NVDCVSS 3.17.5read 2026-10-23
  • CNAweakness (CWE)CWE-20known since 2026-10-23
  • FIRST EPSSEPSS score0.9 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2023-09-21

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2023-09-21
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-q8wc-j5m9-27w3

Frequently asked questions

What is CVE-2023-42805?

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.

Is CVE-2023-42805 actively exploited?

Active exploitation of CVE-2023-42805 has not been confirmed. Its EPSS score was 0.9% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-42805?

CVE-2023-42805 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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