USN-8300-1

Zou Dikai discovered that ngtcp2 serialized peer transport parameters into a fixed 1024-byte stack buffer without bounds checking. When qlog was enabled, a remote attacker could possibly use this issue to execute arbitrary code.

References

Affected packages

Ubuntu:Pro:22.04:LTS / ngtcp2

Package

Name: ngtcp2
Purl: pkg:deb/ubuntu/ngtcp2?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.1.0+dfsg-1ubuntu0.1~esm1

Affected versions

Other

0~20210905-1

0.*

0.1.0+dfsg-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "0.1.0+dfsg-1ubuntu0.1~esm1",
            "binary_name": "libngtcp2-0"
        },
        {
            "binary_version": "0.1.0+dfsg-1ubuntu0.1~esm1",
            "binary_name": "libngtcp2-crypto-gnutls0"
        },
        {
            "binary_version": "0.1.0+dfsg-1ubuntu0.1~esm1",
            "binary_name": "ngtcp2-client"
        },
        {
            "binary_version": "0.1.0+dfsg-1ubuntu0.1~esm1",
            "binary_name": "ngtcp2-server"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:Pro:22.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-40170"
        }
    ]
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8300-1.json"

Ubuntu:24.04:LTS / ngtcp2

Package

Name: ngtcp2
Purl: pkg:deb/ubuntu/ngtcp2?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.12.1+dfsg-1+deb12u1build0.24.04.1

Affected versions

0.*

0.12.1+dfsg-1

0.12.1+dfsg-1build1

0.12.1+dfsg-1build2

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "0.12.1+dfsg-1+deb12u1build0.24.04.1",
            "binary_name": "libngtcp2-9"
        },
        {
            "binary_version": "0.12.1+dfsg-1+deb12u1build0.24.04.1",
            "binary_name": "libngtcp2-crypto-gnutls2"
        },
        {
            "binary_version": "0.12.1+dfsg-1+deb12u1build0.24.04.1",
            "binary_name": "ngtcp2-client"
        },
        {
            "binary_version": "0.12.1+dfsg-1+deb12u1build0.24.04.1",
            "binary_name": "ngtcp2-server"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-40170"
        }
    ],
    "ecosystem": "Ubuntu:24.04:LTS"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8300-1.json"

Ubuntu:25.10 / ngtcp2

Package

Name: ngtcp2
Purl: pkg:deb/ubuntu/ngtcp2?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.11.0-1+deb13u1build0.25.10.1

Affected versions

1.*

1.11.0-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1.11.0-1+deb13u1build0.25.10.1",
            "binary_name": "libngtcp2-16"
        },
        {
            "binary_version": "1.11.0-1+deb13u1build0.25.10.1",
            "binary_name": "libngtcp2-crypto-gnutls8"
        },
        {
            "binary_version": "1.11.0-1+deb13u1build0.25.10.1",
            "binary_name": "ngtcp2-client"
        },
        {
            "binary_version": "1.11.0-1+deb13u1build0.25.10.1",
            "binary_name": "ngtcp2-server"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:25.10",
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-40170"
        }
    ]
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8300-1.json"

Ubuntu:26.04:LTS / ngtcp2

Package

Name: ngtcp2
Purl: pkg:deb/ubuntu/ngtcp2?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.16.0-1ubuntu0.1

Affected versions

1.*

1.11.0-1

1.16.0-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_version": "1.16.0-1ubuntu0.1",
            "binary_name": "libngtcp2-16"
        },
        {
            "binary_version": "1.16.0-1ubuntu0.1",
            "binary_name": "libngtcp2-crypto-gnutls8"
        },
        {
            "binary_version": "1.16.0-1ubuntu0.1",
            "binary_name": "libngtcp2-crypto-ossl0"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "cves": [
        {
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-40170"
        }
    ],
    "ecosystem": "Ubuntu:26.04:LTS"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8300-1.json"