CVE-2026-31812 (GCVE-0-2026-31812)

Vulnerability from cvelistv5 – Published: 2026-03-10 21:04 – Updated: 2026-07-15 01:08
VLAI
Title
Quinn affected by unauthenticated remote DoS via panic in QUIC transport parameter parsing
Summary
Quinn is a pure-Rust, async-compatible implementation of the IETF QUIC transport protocol. Prior to 0.11.14, a remote, unauthenticated attacker can trigger a denial of service in applications using vulnerable quinn versions by sending a crafted QUIC Initial packet containing malformed quic_transport_parameters. In quinn-proto parsing logic, attacker-controlled varints are decoded with unwrap(), so truncated encodings cause Err(UnexpectedEnd) and panic. This is reachable over the network with a single packet and no prior trust or authentication. This vulnerability is fixed in 0.11.14.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
quinn-rs quinn Affected: < 0.11.14
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Red Hat Logging Subsystem for Red Hat OpenShift 6.4 Unaffected: 1780052069 , < * (rpm)
    cpe:/a:redhat:logging:6.4::el9
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Red Hat Red Hat Ansible Automation Platform 2.6 Unaffected: 1777398576 , < * (rpm)
    cpe:/a:redhat:ansible_automation_platform:2.6::el9
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Red Hat Red Hat OpenShift AI 3.3 Unaffected: 1778596806 , < * (rpm)
    cpe:/a:redhat:openshift_ai:3.3::el9
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Red Hat Red Hat Trusted Artifact Signer 1.3 Unaffected: 1773307309 , < * (rpm)
    cpe:/a:redhat:trusted_artifact_signer:1.3::el9
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Red Hat Confidential Compute Attestation     cpe:/a:redhat:confidential_compute_attestation:1
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Red Hat Logging Subsystem for Red Hat OpenShift     cpe:/a:redhat:logging:5
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Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
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Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
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Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3     cpe:/a:redhat:enterprise_linux_ai:3
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Red Hat Red Hat OpenShift AI (RHOAI)     cpe:/a:redhat:openshift_ai
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Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
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Red Hat Red Hat OpenShift Update Service     cpe:/a:redhat:openshift_update_service:5
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Red Hat Red Hat Trusted Profile Analyzer     cpe:/a:redhat:trusted_profile_analyzer:2
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      "cveMetadata": "{\"cveId\": \"CVE-2026-31812\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-30T12:07:47.645Z\", \"dateReserved\": \"2026-03-09T16:33:42.914Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-03-10T21:04:36.812Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.