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CVE-2019-9514 is an uncontrolled-resource-consumption vulnerability in HTTP/2 implementations. A malicious peer sends HTTP/2 HEADERS frames containing invalid HTTP headers, causing the server to generate RST_STREAM control frames. By repeatedly soliciting resets while not reading the peer's responses, the attacker can cause RST_STREAM frames to accumulate in the server's outbound control-message queue without an effective bound. Affected implementations may therefore experience unbounded memory growth and, depending on queueing behavior, excessive CPU consumption.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
45 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An HTTP/2 denial-of-service vulnerability in which HEADERS-frame flooding causes unbounded memory growth; the advisory identifies Undertow and Go components as affected.
Undertow HTTP/2 HEADERS-frame flood denial-of-service vulnerability causing unbounded memory growth.
An HTTP/2 denial-of-service flaw in which HEADERS-frame flooding causes unbounded memory growth.
Netty HTTP/2 denial-of-service vulnerability in which HEADERS-frame flooding causes unbounded memory growth.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.