CVE-2026-25800High· 7.5▾ TwilightQuinn: Remote memory exhaustion in quinn-proto from unbounded out-of-order stream reassembly
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 24.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
0.3%
0.3% → 0.6%
The Assembler component that assembles unordered stream fragments into consecutive chunks of the stream incurs some overhead for non-contiguous fragments. Readers that read from a RecvStream in order (through an AsyncRead impl for example) will be sensitive to peers that send fragments while leaving out early parts of the stream, and in particular, fragments with many gaps (because these cannot be defragmented). In such a scenario, the receiving connection suffers from high buffer overhead, enabling memory exhaustion.
quinn-proto >= 0.1.0, < 0.11.15Upgrade to a patched release:
quinn-proto 0.11.15Connected by shared product, vendor, weakness, or advisory.