View at Official ubuntu advisory, NVD, CVE.org · CVE detail
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
CVE-2019-9516 medium priority: Ubuntu including 1 source packages (nginx), 6 status rows across 6 suites (bionic, cosmic, disco, trusty, upstream, xenial): released 3, ignored 1, needs-triage 1, not-affected 1.
Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory.