CVE-2026-42009

A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.

Database specific

{
    "cna_assigner": "redhat",
    "cwe_ids": [
        "CWE-475"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42009.json"
}

References

Affected packages

Git / gitlab.com/gnutls/gnutls

Affected ranges

Type

GIT

Repo

https://gitlab.com/gnutls/gnutls

Events

Introduced

Last Affected

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

Other

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42009.json"