Detections
Analytics
CVE-2026-42009
high
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.
References
https://bugzilla.redhat.com/show_bug.cgi?id=2467279
https://access.redhat.com/security/cve/CVE-2026-42009
https://access.redhat.com/errata/RHSA-2026:36006
https://access.redhat.com/errata/RHSA-2026:36005
https://access.redhat.com/errata/RHSA-2026:36004
https://access.redhat.com/errata/RHSA-2026:34372
https://access.redhat.com/errata/RHSA-2026:33125
https://access.redhat.com/errata/RHSA-2026:32962
https://access.redhat.com/errata/RHSA-2026:30850
https://access.redhat.com/errata/RHSA-2026:30849
https://access.redhat.com/errata/RHSA-2026:30004
https://access.redhat.com/errata/RHSA-2026:29794
https://access.redhat.com/errata/RHSA-2026:29197
https://access.redhat.com/errata/RHSA-2026:26409
https://access.redhat.com/errata/RHSA-2026:26319
https://access.redhat.com/errata/RHSA-2026:20613
https://access.redhat.com/errata/RHSA-2026:20612