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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade gnutls-utilsUpgrade gnutlsUpgrade gnutls-c++Upgrade gnutls-daneUpgrade gnutls-devel | May 27, 2026 | May 26, 2026 |
| Alpine Linux | — | Upgrade gnutls | May 20, 2026 | May 18, 2026 |
| Amazon Linux Ami 2 | — | Upgrade gnutls-daneUpgrade gnutls-debuginfoUpgrade gnutls-develUpgrade gnutls-utilsUpgrade gnutls-c++Upgrade gnutls | Jun 9, 2026 | Jun 9, 2026 |
| Amazon_linux_2023 | — | Upgrade gnutls-dane-debuginfoUpgrade gnutlsUpgrade gnutls-daneUpgrade gnutls-utils-debuginfoUpgrade gnutls-develUpgrade gnutls-utilsUpgrade gnutls-debugsourceUpgrade gnutls-c++-debuginfoUpgrade gnutls-debuginfoUpgrade gnutls-c++ | May 28, 2026 | May 18, 2026 |
| Debian | — | Upgrade gnutls28 | May 20, 2026 | May 20, 2026 |
| Oracle_linux | — | Upgrade gnutls-utilsUpgrade gnutls-daneUpgrade gnutlsUpgrade gnutls-c++Upgrade gnutls-devel | Jun 4, 2026 | May 18, 2026 |
| Redhat Openshift | — | Upgrade ose-rhel-coreos | Aug 10, 2026 | Apr 29, 2026 |
| Redhat_linux | — | Upgrade gnutls-c++-debuginfoUpgrade gnutls-fipsUpgrade gnutls-develUpgrade gnutls-daneUpgrade gnutls-debuginfoUpgrade gnutlsUpgrade gnutls-debugsourceUpgrade gnutls-c++Upgrade gnutls-dane-debuginfoUpgrade gnutls-utilsUpgrade gnutls-utils-debuginfo | May 28, 2026 | Apr 29, 2026 |
| Rocky_linux | — | Upgrade gnutls-daneUpgrade gnutls-c++Upgrade gnutls-c++-debuginfoUpgrade gnutls-debugsourceUpgrade gnutls-dane-debuginfoUpgrade gnutls-develUpgrade gnutls-fipsUpgrade gnutls-debuginfoUpgrade gnutls-utils-debuginfoUpgrade gnutls-utilsUpgrade gnutls | Jun 1, 2026 | May 29, 2026 |
| Ubuntu | — | Upgrade libgnutls30Upgrade libgnutls30t64Upgrade libgnutls28-dev (Ubuntu Pro)Upgrade gnutls-bin (Ubuntu Pro)Upgrade guile-gnutls (Ubuntu Pro)Upgrade libgnutls30 (Ubuntu Pro)Upgrade libgnutls-dev (Ubuntu Pro)Upgrade libgnutls-openssl27 (Ubuntu Pro)Upgrade libgnutlsxx28 (Ubuntu Pro)Upgrade libgnutls-dane0 (Ubuntu Pro) | May 25, 2026 | May 20, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jun 29, 2026 | May 18, 2026 |
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