CVE-2026-42009
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
May 18, 2026
Vendor
unknown
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.