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CVE-2026-94450

Potential denial of service when configured to send Retry packets in s2n-quic

Improper validation of the Destination Connection ID length in s2n-quic 1.88.0 and earlier may allow an unauthenticated remote user to cause a denial of service by shutting down a server endpoint via a single crafted UDP datagram. Only server endpoints specifically configured to send Retry packets are affected. To remediate this issue, users should upgrade to version v1.89.0 or later.

CVSS 4.0 · 8.7 High EPSS 1.9% KEV · Not listed
Vendors
Aws
Products
S2n-quic
CVE-2026-10740

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.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Aws
Products
S2n-quic