vulnerability
FreeBSD: (Multiple Advisories) (CVE-2019-9511)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:N/I:N/A:C) | Aug 21, 2019 | Aug 21, 2019 | Jun 15, 2026 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
Aug 21, 2019
Added
Aug 21, 2019
Modified
Jun 15, 2026
Description
Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.
Solutions
freebsd-upgrade-package-nodefreebsd-upgrade-package-node10freebsd-upgrade-package-node8freebsd-upgrade-package-libnghttp2freebsd-upgrade-package-nghttp2freebsd-upgrade-package-nginxfreebsd-upgrade-package-nginx-devel
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.