Описание
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.
Отчет
This vulnerability is rated as an Important impact because an unauthenticated remote attacker can cause a denial of service without requiring user interaction or elevated privileges. The defect specifically resides in the datagram reordering logic of GnuTLS, leaving standard TCP-based TLS services unaffected across Red Hat environments. Systems are only exposed if they run network services configured to process untrusted Datagram Transport Layer Security (DTLS) handshakes.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | gnutls | Not affected | ||
| Red Hat OpenShift Container Platform 4 | openshift4/ose-hypershift-rhel9 | Not affected | ||
| Red Hat OpenShift Container Platform 5 | openshift/ose-rhel-coreos-9 | Affected | ||
| Red Hat Enterprise Linux 10 | gnutls | Fixed | RHSA-2026:20613 | 26.05.2026 |
| Red Hat Enterprise Linux 10.0 Extended Update Support | gnutls | Fixed | RHSA-2026:26409 | 16.06.2026 |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support | gnutls | Fixed | RHSA-2026:34372 | 01.07.2026 |
| Red Hat Enterprise Linux 8 | gnutls | Fixed | RHSA-2026:20611 | 26.05.2026 |
| Red Hat Enterprise Linux 8 | gnutls | Fixed | RHSA-2026:20611 | 26.05.2026 |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | gnutls | Fixed | RHSA-2026:33125 | 29.06.2026 |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | libtasn1 | Fixed | RHSA-2026:33125 | 29.06.2026 |
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Дополнительная информация
Статус:
EPSS
7.5 High
CVSS3
Связанные уязвимости
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.
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.
Gnutls: gnutls: denial of service via dtls packet reordering vulnerability
A flaw was found in gnutls. A remote attacker could exploit an issue i ...
EPSS
7.5 High
CVSS3