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 gnutls-debugsourceUpgrade gnutlsUpgrade gnutls-utils-debuginfoUpgrade gnutls-utilsUpgrade gnutls-dane-debuginfoUpgrade gnutls-debuginfoUpgrade gnutls-c++-debuginfoUpgrade gnutls-develUpgrade gnutls-daneUpgrade 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-daneUpgrade gnutls-fipsUpgrade gnutls-develUpgrade gnutls-utilsUpgrade gnutls-c++Upgrade gnutls | Sep 22, 2025 | Jul 10, 2025 |
| Redhat_linux | — | Upgrade gnutlsUpgrade gnutls-utilsUpgrade gnutls-c++-debuginfoNo solution existsUpgrade gnutls-develUpgrade gnutls-debugsourceUpgrade gnutls-fipsUpgrade gnutls-debuginfoUpgrade gnutls-utils-debuginfoUpgrade gnutls-c++Upgrade gnutls-daneUpgrade gnutls-dane-debuginfo | Jul 11, 2025 | Jul 10, 2025 |
| Rocky_linux | — | Upgrade gnutls-utils-debuginfoUpgrade gnutls-fipsUpgrade gnutls-c++-debuginfoUpgrade gnutlsUpgrade gnutls-c++Upgrade gnutls-dane-debuginfoUpgrade gnutls-develUpgrade gnutls-utilsUpgrade gnutls-daneUpgrade gnutls-debugsourceUpgrade gnutls-debuginfo | Feb 5, 2026 | Oct 10, 2025 |
| Suse | — | Upgrade libgnutls-develUpgrade libgnutlsxx30Upgrade libgnutlsxx-develUpgrade libgnutls30-hmacUpgrade libgnutls30-32bitUpgrade gnutls-guileUpgrade libgnutls30-hmac-32bitUpgrade gnutlsUpgrade libgnutls-devel-32bitUpgrade libgnutlsxx28Upgrade libgnutls30 | 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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