CVE-2026-10740

medium

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

https://aws.amazon.com/security/security-bulletins/2026-042-aws/

https://github.com/aws/s2n-quic/security/advisories/GHSA-9q54-f358-3fqf

https://github.com/aws/s2n-quic/releases/tag/v1.82.0

Details

Source: Mitre, NVD

Published: 2026-06-10

Updated: 2026-06-10

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 5.3

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Severity: Medium

CVSS v4

Base Score: 6.9

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00037