A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.
CVSS Details
- CVSS 3.1 Base Score: 7.1
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade gnutls-daneUpgrade gnutls-develUpgrade gnutls-c++Upgrade gnutls-utilsUpgrade gnutls | May 27, 2026 | May 26, 2026 |
| Alpine Linux | — | Upgrade gnutls | May 28, 2026 | May 26, 2026 |
| Amazon_linux_2023 | — | Upgrade gnutls-utilsUpgrade gnutls-develUpgrade gnutls-debugsourceUpgrade gnutls-dane-debuginfoUpgrade gnutls-debuginfoUpgrade gnutls-c++-debuginfoUpgrade gnutls-utils-debuginfoUpgrade gnutls-c++Upgrade gnutls-daneUpgrade gnutls | Jun 9, 2026 | May 26, 2026 |
| Debian | — | Upgrade gnutls28 | May 20, 2026 | May 20, 2026 |
| Oracle_linux | — | Upgrade gnutlsUpgrade gnutls-utilsUpgrade gnutls-c++Upgrade gnutls-daneUpgrade gnutls-devel | Jun 4, 2026 | May 26, 2026 |
| Redhat_linux | — | No solution existsUpgrade gnutls-develUpgrade gnutls-fipsUpgrade gnutls-c++-debuginfoUpgrade gnutls-debugsourceUpgrade gnutls-dane-debuginfoUpgrade gnutls-utilsUpgrade gnutls-utils-debuginfoUpgrade gnutls-c++Upgrade gnutls-daneUpgrade gnutlsUpgrade gnutls-debuginfo | May 28, 2026 | Apr 29, 2026 |
| Rocky_linux | — | Upgrade gnutls-debuginfoUpgrade gnutls-utilsUpgrade gnutls-daneUpgrade gnutls-utils-debuginfoUpgrade gnutls-debugsourceUpgrade gnutls-develUpgrade gnutls-dane-debuginfoUpgrade gnutls-fipsUpgrade gnutlsUpgrade gnutls-c++-debuginfoUpgrade gnutls-c++ | Jun 1, 2026 | May 29, 2026 |
| Ubuntu | — | Upgrade libgnutls30 (Ubuntu Pro)Upgrade libgnutls30t64Upgrade libgnutls30 | May 25, 2026 | May 20, 2026 |
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