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-develUpgrade gnutls-daneUpgrade gnutls-utilsUpgrade gnutls-c++Upgrade gnutls | May 27, 2026 | May 26, 2026 |
| Alpine Linux | — | Upgrade gnutls | May 28, 2026 | May 26, 2026 |
| Amazon_linux_2023 | — | Upgrade gnutls-c++-debuginfoUpgrade gnutls-debuginfoUpgrade gnutls-dane-debuginfoUpgrade gnutls-utilsUpgrade gnutls-c++Upgrade gnutls-develUpgrade gnutls-debugsourceUpgrade gnutls-utils-debuginfoUpgrade gnutls-daneUpgrade gnutls | Jun 9, 2026 | May 26, 2026 |
| Debian | — | Upgrade gnutls28 | May 20, 2026 | May 20, 2026 |
| Oracle_linux | — | Upgrade gnutls-fipsUpgrade gnutls-daneUpgrade gnutls-c++Upgrade gnutls-develUpgrade gnutls-utilsUpgrade gnutls | Jun 4, 2026 | May 26, 2026 |
| Redhat_linux | — | Upgrade gnutls-debuginfoUpgrade gnutlsUpgrade gnutls-debugsourceUpgrade gnutls-utilsUpgrade gnutls-daneUpgrade gnutls-dane-debuginfoUpgrade gnutls-utils-debuginfoUpgrade gnutls-c++Upgrade gnutls-c++-debuginfoNo solution existsUpgrade gnutls-develUpgrade gnutls-fips | May 28, 2026 | Apr 29, 2026 |
| Rocky_linux | — | Upgrade gnutls-fipsUpgrade gnutls-c++-debuginfoUpgrade gnutls-dane-debuginfoUpgrade gnutls-c++Upgrade gnutlsUpgrade gnutls-develUpgrade gnutls-debuginfoUpgrade gnutls-utils-debuginfoUpgrade gnutls-utilsUpgrade gnutls-debugsourceUpgrade gnutls-dane | Jun 1, 2026 | May 29, 2026 |
| Ubuntu | — | Upgrade libgnutls30 (Ubuntu Pro)Upgrade libgnutls30t64Upgrade libgnutls30 | May 25, 2026 | May 20, 2026 |
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