CVE-2026-10740

Excessive memory allocation in s2n-quic

Published Jun 10, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-9q54-f358-3fqf s2n-quic has excessive memory allocation
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Excessive memory allocation in s2n-quic
First Time appeared Aws
Aws s2n-quic
Weaknesses CWE-770
CPEs cpe:2.3:a:aws:s2n-quic:*:*:*:*:*:*:*:*
Vendors & Products Aws
Aws s2n-quic
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
AMZN
Published
Updated
Jun 10, 2026, 7:14 PM
Reserved
Jun 3, 2026, 1:13 PM
Status
Awaiting Analysis
Published
Jun 10, 2026, 7:16 PM
Modified
Oct 26, 2026, 11:10 AM