CVE-2026-42009
Published: May 18, 2026
Modified: Jun 2, 2026
CVSS v3.1
7.5
Description
A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.
| Vendor | Product | Versions |
|---|---|---|
Red Hat | Red Hat Enterprise Linux 10 | unaffected 0:3.8.10-4.el10_2 - < * |
Red Hat | Red Hat Enterprise Linux 8 | unaffected 0:3.6.16-8.el8_10.6 - < * |
Red Hat | Red Hat Enterprise Linux 8 | unaffected 0:3.6.16-8.el8_10.6 - < * |
Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:3.8.10-4.el9_8 - < * |
Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:3.8.10-4.el9_8 - < * |
Red Hat | Red Hat Hardened Images | unaffected 3.8.13-1.hum1 - < * |
Red Hat | Red Hat Enterprise Linux 6 | All versions |
Red Hat | Red Hat Enterprise Linux 7 | All versions |
Red Hat | Red Hat OpenShift Container Platform 4 | All versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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