UBUNTU-CVE-2026-31812

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Source
https://ubuntu.com/security/CVE-2026-31812
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31812.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-31812
Upstream
Published
2026-03-10T22:16:00Z
Modified
2026-06-30T18:17:49Z
Severity
  • 8.7 (High) CVSS_V4 - 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 CVSS Calculator
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:24.04:LTS / rust-quinn-proto

Package

Name
rust-quinn-proto
Purl
pkg:deb/ubuntu/rust-quinn-proto?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.10.2-1
0.10.5-2
0.10.6-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librust-quinn-proto-dev",
            "binary_version": "0.10.6-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31812.json"

Ubuntu:25.10 / rust-quinn-proto

Package

Name
rust-quinn-proto
Purl
pkg:deb/ubuntu/rust-quinn-proto?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.10.6-1
0.11.9-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librust-quinn-proto-dev",
            "binary_version": "0.11.9-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31812.json"

Ubuntu:26.04:LTS / rust-quinn-proto

Package

Name
rust-quinn-proto
Purl
pkg:deb/ubuntu/rust-quinn-proto?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.11.9-1
0.11.9-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librust-quinn-proto-dev",
            "binary_version": "0.11.9-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31812.json"