USN-8233-2

Andrew MacPherson discovered that nghttp2 did not properly validate internal state when the session termination API was called. A remote attacker could possibly use this issue to cause nghttp2 to crash, resulting in a denial of service.

References

Affected packages

Ubuntu:26.04:LTS / nghttp2

Package

Name: nghttp2
Purl: pkg:deb/ubuntu/nghttp2?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.68.0-2ubuntu0.1

Affected versions

1.*

1.64.0-1.1ubuntu1

1.64.0-1.1ubuntu2

1.68.0-1

1.68.0-2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libnghttp2-14",
            "binary_version": "1.68.0-2ubuntu0.1"
        },
        {
            "binary_name": "nghttp2",
            "binary_version": "1.68.0-2ubuntu0.1"
        },
        {
            "binary_name": "nghttp2-client",
            "binary_version": "1.68.0-2ubuntu0.1"
        },
        {
            "binary_name": "nghttp2-proxy",
            "binary_version": "1.68.0-2ubuntu0.1"
        },
        {
            "binary_name": "nghttp2-server",
            "binary_version": "1.68.0-2ubuntu0.1"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:26.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-27135"
        }
    ]
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8233-2.json"