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A heap-buffer-overread vulnerability was found in GnuTLS in how it handles the Certificate Transparency (CT) Signed Certificate Timestamp (SCT) extension during X.509 certificate parsing. This flaw allows a malicious user to create a certificate containing a malformed SCT extension (OID 1.3.6.1.4.1.11129.2.4.2) that contains sensitive data. This issue leads to the exposure of confidential information when GnuTLS verifies certificates from certain websites when the certificate (SCT) is not checked correctly.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade gnutls-c++Upgrade gnutls-utilsUpgrade gnutls-daneUpgrade gnutlsUpgrade gnutls-devel | Sep 30, 2025 | Sep 17, 2025 |
| Alpine Linux | — | Upgrade gnutls | Dec 5, 2025 | Jul 10, 2025 |
| Amazon_linux_2023 | — | Upgrade gnutlsUpgrade gnutls-dane-debuginfoUpgrade gnutls-debugsourceUpgrade gnutls-utilsUpgrade gnutls-utils-debuginfoUpgrade gnutls-daneUpgrade gnutls-c++-debuginfoUpgrade gnutls-develUpgrade gnutls-debuginfoUpgrade gnutls-c++ | Aug 19, 2025 | Jul 10, 2025 |
| Debian | — | Upgrade gnutls28 | Jul 11, 2025 | Jul 11, 2025 |
| Dell Powerstore Dsa2025429 | — | Upgrade Dell PowerStoreOS to the latest version | Dec 3, 2025 | Dec 2, 2025 |
| Dell Powerstore Dsa2026039 | — | Upgrade Dell PowerStoreOS to the latest version | Jan 13, 2026 | Jan 6, 2026 |
| Freebsd | — | Upgrade gnutls | Jul 15, 2025 | Jul 14, 2025 |
| Gentoo Linux | — | Upgrade net-libs/gnutls. | Sep 18, 2025 | Sep 17, 2025 |
| Nutanix Ahv | — | Upgrade Nutanix AHV to the latest version | Jun 5, 2026 | Dec 15, 2025 |
| Oracle_linux | — | Upgrade gnutls-c++Upgrade gnutls-utilsUpgrade gnutlsUpgrade gnutls-daneUpgrade gnutls-fipsUpgrade gnutls-devel | Sep 22, 2025 | Jul 10, 2025 |
| Redhat_linux | — | Upgrade gnutlsNo solution existsUpgrade gnutls-c++-debuginfoUpgrade gnutls-utilsUpgrade gnutls-debugsourceUpgrade gnutls-develUpgrade gnutls-fipsUpgrade gnutls-daneUpgrade gnutls-c++Upgrade gnutls-debuginfoUpgrade gnutls-dane-debuginfoUpgrade gnutls-utils-debuginfo | Jul 11, 2025 | Jul 10, 2025 |
| Rocky_linux | — | Upgrade gnutls-utilsUpgrade gnutls-debuginfoUpgrade gnutls-debugsourceUpgrade gnutls-daneUpgrade gnutls-c++Upgrade gnutls-utils-debuginfoUpgrade gnutlsUpgrade gnutls-c++-debuginfoUpgrade gnutls-develUpgrade gnutls-dane-debuginfoUpgrade gnutls-fips | Feb 5, 2026 | Oct 10, 2025 |
| Suse | — | Upgrade libgnutls30-hmacUpgrade libgnutls-develUpgrade libgnutlsxx30Upgrade libgnutlsxx-develUpgrade libgnutls30Upgrade gnutls-guileUpgrade libgnutls30-hmac-32bitUpgrade gnutlsUpgrade libgnutls-devel-32bitUpgrade libgnutls30-32bitUpgrade libgnutlsxx28 | Dec 5, 2025 | Sep 20, 2025 |
| Ubuntu | — | Upgrade libgnutls30Upgrade libgnutls30t64 | Jul 14, 2025 | Jul 10, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 24, 2025 | Jul 10, 2025 |
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