CVE-2026-94450
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| AWS | s2n-quic | 0 <= 1.88.0 | affected |
Weaknesses
- CWE-1284: CWE-1284 Improper validation of specified quantity in input
References
- https://github.com/aws/s2n-quic/releases/tag/v1.89.0
- https://aws.amazon.com/security/security-bulletins/2026-116-aws/
- https://github.com/aws/s2n-quic/security/advisories/GHSA-5rw2-6x5m-v22x
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