It was found in Undertow before 1.3.28 that with non-clean TCP close, the Websocket server gets into infinite loop on every IO thread, effectively causing DoS.
{
"nvd_published_at": null,
"github_reviewed": true,
"severity": "MODERATE",
"github_reviewed_at": "2020-06-16T20:56:49Z",
"cwe_ids": [
"CWE-835"
]
}