s2n-quic 1.8.2+ Unbounded CRYPTO frame reassembler DoS
CVE-2026-10740 Published on June 10, 2026
Excessive memory allocation in s2n-quic
Unbounded memory allocation in the CRYPTO frame reassembler in s2n-quic before 1.8.2 may allow an unauthenticated remote actor to cause a denial of service (degraded availability) by sending crafted QUIC Initial packets.
To remediate this issue, users should upgrade to v1.8.2.
Vulnerability Analysis
CVE-2026-10740 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a small impact on availability.
Weakness Type
Allocation of Resources Without Limits or Throttling
The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
Products Associated with CVE-2026-10740
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Affected Versions
AWS s2n-quic:- Before and including 1.8.1 is affected.