CVE-2026-31812: Quinn affected by unauthenticated remote DoS via panic in QUIC transport parameter parsing
Noroxi assessment
Priority: Monitor (action score 34/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.57% (FIRST EPSS).
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: quinn-rs quinn 0.11.14.
Low priority for now. Upgrade to quinn-rs quinn 0.11.14 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- Published
- Mar 10, 2026
- Updated
- Aug 25, 2026
- EPSS
- 0.5% · 47th percentile
- CWE
- CWE-248
Report tools
Action score
34
Low priority for now.
- CVSS
- 34 / 40 · 8.7 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CISA SSVC decision
- Exploitation
- proof of concept
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · GitHub_M
- 8.7
- NVD has not scored this yet; the score shown is the CNA’s.
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
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| logging | 6.4 | cpe:2.3:redhat:logging:6.4 |
| ansible automation platform | 2.6 | cpe:2.3:redhat:ansible_automation_platform:2.6 |
| openshift ai | 3.3 | cpe:2.3:redhat:openshift_ai:3.3 |
| trusted artifact signer | 1.3 | cpe:2.3:redhat:trusted_artifact_signer:1.3 |
| confidential compute attestation | 1 | cpe:2.3:redhat:confidential_compute_attestation:1 |
| logging | 5 | cpe:2.3:redhat:logging:5 |
| enterprise linux | 10 | cpe:2.3:redhat:enterprise_linux:10 |
| enterprise linux | 7 | cpe:2.3:redhat:enterprise_linux:7 |
| enterprise linux | 8 | cpe:2.3:redhat:enterprise_linux:8 |
| enterprise linux | 9 | cpe:2.3:redhat:enterprise_linux:9 |
| enterprise linux ai | 3 | cpe:2.3:redhat:enterprise_linux_ai:3 |
| openshift ai | cpe:2.3:redhat:openshift_ai:undefined |
and 3 more
Versions reported by the vendor
Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.
quinn-rs quinn
- < 0.11.14affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| crates.io | quinn-proto | from 0.5.0 · before 0.11.14 | 0.11.14 |
| crates.io | quinn-proto | before 0.11.14 | 0.11.14 |
| Debian:12 | rust-quinn-proto | from 0 | — |
| Debian:14 | rust-quinn-proto | before 0.11.14-1 | 0.11.14-1 |
| openSUSE:Leap 15.6 | rust | before 1.94.0-150500.27.65.1 | 1.94.0-150500.27.65.1 |
| openSUSE:Leap 15.6 | rust1.92 | before 1.92.0-150300.7.6.1 | 1.92.0-150300.7.6.1 |
| openSUSE:Leap 15.6 | rust1.93 | before 1.93.0-150300.7.6.1 | 1.93.0-150300.7.6.1 |
| openSUSE:Leap 15.6 | rust1.94 | before 1.94.0-150300.7.6.1 | 1.94.0-150300.7.6.1 |
| openSUSE:Leap 16.0 | rust1.94 | before 1.94.1-160000.1.1 | 1.94.1-160000.1.1 |
| openSUSE:Tumbleweed | python-uv | before 0.10.11-1.1 | 0.10.11-1.1 |
| openSUSE:Tumbleweed | rust1.92 | before 1.92.0-2.1 | 1.92.0-2.1 |
| openSUSE:Tumbleweed | rust1.93 | before 1.93.0-3.1 | 1.93.0-3.1 |
| openSUSE:Tumbleweed | rust1.94 | before 1.94.0-2.1 | 1.94.0-2.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | rust | before 1.94.0-150400.24.71.1 | 1.94.0-150400.24.71.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | rust | before 1.94.0-150500.27.65.1 | 1.94.0-150500.27.65.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | rust1.92 | before 1.92.0-150300.7.6.1 | 1.92.0-150300.7.6.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | rust1.93 | before 1.93.0-150300.7.6.1 | 1.93.0-150300.7.6.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | rust1.94 | before 1.94.0-150300.7.6.1 | 1.94.0-150300.7.6.1 |
| SUSE:Linux Enterprise Server 16.0 | python-uv | before 0.7.18-160000.5.1 | 0.7.18-160000.5.1 |
Same product
quinn-rs: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-25800quinn-proto has remote memory exhaustion from unbounded out-of-order stream reassembly30Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| quinn-rs quinn | 0.11.14 · description | Vendor (CNA) |
| crates.io:quinn-proto | 0.11.14 | Package registry (OSV) |
| debian:rust-quinn-proto | 0.11.14-1 · Debian:14 | Package registry (OSV) |
| opensuse:python-uv | 0.10.11-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:rust | 1.94.0-150500.27.65.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:rust1.92 | 1.92.0-150300.7.6.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:rust1.93 | 1.93.0-150300.7.6.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:rust1.94 | 1.94.0-150300.7.6.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| suse:python-uv | 0.7.18-160000.5.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
| suse:rust | 1.94.0-150500.27.65.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7 | Package registry (OSV) |
| suse:rust1.92 | 1.92.0-150300.7.6.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7 | Package registry (OSV) |
| suse:rust1.93 | 1.93.0-150300.7.6.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7 | Package registry (OSV) |
| suse:rust1.94 | 1.94.0-150300.7.6.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- Integrity
- Availability
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- X
Weakness class (CWE)
CWE-248 · Uncaught ExceptionCVSS vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (7 more)Show less
- access.redhat.com/errata/RHSA-2026:13545
- access.redhat.com/errata/RHSA-2026:19712
- access.redhat.com/errata/RHSA-2026:22862
- access.redhat.com/errata/RHSA-2026:5459
- access.redhat.com/security/cve/CVE-2026-31812
- bugzilla.redhat.com/show_bug.cgi?id=2446330
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31812.json
Vendor advisories and official records. Exploit/PoC links are deliberately left out.