CVE-2026-42009
Discovered by AISLEPUBLISHEDCWE-475
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.
CVSS Base Scores
CVSS v3.1(Primary)
7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Version | Status |
|---|---|---|---|
| Red Hat | GnuTLS | 0:3.6.16-8.el8_10.6 | unaffected |
| Red Hat | GnuTLS | 3.8.13-1.hum1 | — |
Credits
- Red Hat would like to thank Joshua Rogers (AISLE Research Team) for reporting this issue.