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CVE-2025-59530 is a denial-of-service vulnerability in quic-go, a Go implementation of the QUIC protocol. In affected versions prior to 0.49.0, 0.54.1, and 0.55.0, a misbehaving or malicious QUIC server can trigger a reachable assertion failure in a quic-go client during the handshake by prematurely sending a HANDSHAKE_DONE frame. This causes the client process to panic or crash. The flaw stems from incorrect handling of premature HANDSHAKE_DONE frames and the associated key-discard logic during handshake state processing.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A quic-go vulnerability causing crashes due to a premature HANDSHAKE_DONE frame.
A denial-of-service vulnerability in the quic-go Go library where a malicious or misbehaving server can trigger an assertion failure during the handshake phase, crashing the client process.
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.