Quinn affected by unauthenticated remote DoS via panic in QUIC transport parameter parsing
Priority HIGH 71CWE-248Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 5 fixed, 6 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-248.
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00574 47th percentileScored 2026-11-07
Fix Partial quinn (quinn-rs): 0.11.14quinn-proto (crates.io): 0.11.14Red Hat: 5 advisoriesRed Hat: 5 fixed, 6 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| quinn-rs | quinn | before 0.11.14 | 0.11.14 | Patch available | CNA |
| — | quinn-proto (crates.io) | before 0.11.14 | 0.11.14 | Patch available | GHSA-6xvm-j4wr-6v98 |
- quinn Vendorquinn-rs Affected before 0.11.14 Fixed in 0.11.14 Patch available CNA
- quinn-proto (crates.io) Vendor— Affected before 0.11.14 Fixed in 0.11.14 Patch available GHSA-6xvm-j4wr-6v98
Remediation
- Fix · CNA quinn (quinn-rs) Fixed in 0.11.14
- Fix · GHSA-6xvm-j4wr-6v98 quinn-proto (crates.io) Fixed in 0.11.14 Advisory →
Red Hat 5 advisories
- RHSA-2026:87410 Released 2026-10-21 · Red Hat rating CriticalRHOAI 2.25.12 - Red Hat OpenShift AI
- Red Hat OpenShift AI 2.25 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-caikit-nlp-rhel9, registry.redhat.io/rhoai/odh-codeflare-operator-rhel9 +47
- RHSA-2026:22862 Released 2026-06-03 · Red Hat rating ImportantLogging for Red Hat OpenShift - 6.4.5
- Logging Subsystem for Red Hat OpenShift 6.4 registry.redhat.io/openshift-logging/eventrouter-rhel9, registry.redhat.io/openshift-logging/logging-loki-rhel9, registry.redhat.io/openshift-logging/vector-rhel9
- RHSA-2026:19712 Released 2026-05-20 · Red Hat rating CriticalRHOAI 3.3.3 - Red Hat OpenShift AI
- Red Hat OpenShift AI 3.3 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-dashboard-rhel9, registry.redhat.io/rhoai/odh-data-science-pipelines-argo-argoexec-rhel9 +33
Show 2 more Red Hat advisories
- RHSA-2026:13545 Released 2026-05-04 · Red Hat rating ImportantRed Hat Ansible Automation Platform 2.6 Container Release Update
- Red Hat Ansible Automation Platform 2.6 registry.redhat.io/ansible-automation-platform-26/ansible-dev-tools-rhel9, registry.redhat.io/ansible-automation-platform-26/controller-rhel9, registry.redhat.io/ansible-automation-platform-26/eda-controller-rhel9 +11
- RHSA-2026:5459 Released 2026-03-23 · Red Hat rating ImportantRHTAS 1.3.3 - Red Hat Trusted Artifact Signer Release
- Red Hat Trusted Artifact Signer 1.3 registry.redhat.io/rhtas/tuffer-rhel9, registry.redhat.io/rhtas/tuftool-rhel9
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Confidential Compute Attestation | Affected | No fix yet |
| Logging Subsystem for Red Hat OpenShift | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 10 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 9 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | Affected | No fix yet |
| Red Hat OpenShift Container Platform 4 | Affected | No fix planned: Will not fix |
| Logging Subsystem for Red Hat OpenShift 6.4 | Fixed | RHSA-2026:22862 |
| Red Hat Ansible Automation Platform 2.6 | Fixed | RHSA-2026:13545 |
| Red Hat OpenShift AI 2.25 | Fixed | RHSA-2026:87410 |
| Red Hat OpenShift AI 3.3 | Fixed | RHSA-2026:19712 |
| Red Hat Trusted Artifact Signer 1.3 | Fixed | RHSA-2026:5459 |
Not affected: 11 products
- Confidential Compute Attestation
- Logging Subsystem for Red Hat OpenShift 6.4
- Red Hat Ansible Automation Platform 2.6
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift AI 2.25
- Red Hat OpenShift AI 3.3
- Red Hat OpenShift Update Service
- Red Hat Trusted Profile Analyzer
Timeline
- 2026-10-02 Threatist record created from CVE-2026-31812
- 2026-10-03 Alias added: GHSA-6xvm-j4wr-6v98
- 2026-10-22 Fix available: RHSA-2026:87410 · Red Hat
- 2026-10-23 Fix available: Red Hat OpenShift AI 2.25 · Red Hat
- 2026-10-25 EPSS moved to the below the 50th percentile
References
More quinn-rs vulnerabilities
- TI-2026-20864 quinn-proto has remote memory exhaustion from unbounded out-of-order stream reassembly CVSS 3.1HIGH 7.5
Sources
- CVE-2026-31812 · CVE Program
- CVE-2026-31812 · NVD
- FIRST EPSS
- GHSA-6xvm-j4wr-6v98 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-31812 · Red Hat security data · CC BY 4.0
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