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 Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade gnutls-c++Upgrade gnutls-daneUpgrade gnutls-develUpgrade gnutls-utilsUpgrade gnutls | May 27, 2026 | May 26, 2026 |
| Alpine Linux | — | Upgrade gnutls | May 20, 2026 | May 18, 2026 |
| Amazon Linux Ami 2 | — | Upgrade gnutlsUpgrade gnutls-utilsUpgrade gnutls-c++Upgrade gnutls-develUpgrade gnutls-debuginfoUpgrade gnutls-dane | Jun 9, 2026 | Jun 9, 2026 |
| Amazon_linux_2023 | — | Upgrade gnutls-dane-debuginfoUpgrade gnutls-daneUpgrade gnutls-c++Upgrade gnutls-utils-debuginfoUpgrade gnutls-develUpgrade gnutls-debugsourceUpgrade gnutls-c++-debuginfoUpgrade gnutls-debuginfoUpgrade gnutlsUpgrade gnutls-utils | May 28, 2026 | May 18, 2026 |
| Debian | — | Upgrade gnutls28 | May 20, 2026 | May 20, 2026 |
| Oracle_linux | — | Upgrade gnutls-develUpgrade gnutls-utilsUpgrade gnutls-c++Upgrade gnutlsUpgrade gnutls-dane | Jun 4, 2026 | May 18, 2026 |
| Redhat Openshift | — | Upgrade rhcos | Aug 10, 2026 | Apr 29, 2026 |
| Redhat_linux | — | Upgrade gnutls-develUpgrade gnutls-fipsUpgrade gnutls-c++-debuginfoUpgrade gnutls-daneUpgrade gnutls-dane-debuginfoUpgrade gnutls-debugsourceUpgrade gnutlsUpgrade gnutls-c++Upgrade gnutls-utilsUpgrade gnutls-utils-debuginfoUpgrade gnutls-debuginfo | May 28, 2026 | Apr 29, 2026 |
| Rocky_linux | — | Upgrade gnutls-utilsUpgrade gnutlsUpgrade gnutls-c++-debuginfoUpgrade gnutls-debugsourceUpgrade gnutls-c++Upgrade gnutls-daneUpgrade gnutls-dane-debuginfoUpgrade gnutls-utils-debuginfoUpgrade gnutls-debuginfoUpgrade gnutls-fipsUpgrade gnutls-devel | Jun 1, 2026 | May 29, 2026 |
| Ubuntu | — | Upgrade libgnutls30t64Upgrade libgnutls30Upgrade libgnutls28-dev (Ubuntu Pro)Upgrade libgnutls-openssl27 (Ubuntu Pro)Upgrade gnutls-bin (Ubuntu Pro)Upgrade libgnutlsxx28 (Ubuntu Pro)Upgrade guile-gnutls (Ubuntu Pro)Upgrade libgnutls30 (Ubuntu Pro)Upgrade libgnutls-dev (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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