Description
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.
References (3)
Core 3
Core References
Vendor Advisory vendor-advisory
https://aws.amazon.com/security/security-bulletins/2026-042-aws/
Third Party Advisory third-party-advisory
https://github.com/aws/s2n-quic/security/advisories/GHSA-9q54-f358-3fqf
Scores
CVSS v3
5.3
EPSS
0.0029
EPSS Percentile
20.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (1)
AWS/s2n-quic
< 1.8.1
Published
Jun 10, 2026
Tracked Since
Jun 11, 2026