# CVE-2025-9820: gnutls: The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorit... CVE-2025-9820 is fixed in 16 products on 1 platform, first by RHSA-2026:3477, released November 18, 2025. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2025-9820 - Priority: Routine - CVSS: 5.3 (Moderate) - EPSS: 0.0022 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Nov 18, 2025 ## Description The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS. Security Fix(es): * gnutls: Stack-based Buffer Overflow in gnutls_pkcs11_token_init() Function (CVE-2025-9820) * gnutls: GnuTLS: Denial of Service via excessive resource consumption during certificate verification (CVE-2025-14831) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | gnutls RHEL 10 | 3.8.10-3.el10_1 | [RHSA-2026:3477](https://patchblox.com/security/data/fix/linux/rhsa-2026-3477.md) | Nov 18, 2025 | | Linux | gnutls RHEL 8 | 0:3.6.16-8.el8_10.5 | [RHSA-2026:5585](https://patchblox.com/security/data/fix/linux/rhsa-2026-5585.md) | Apr 15, 2026 | | Linux | gnutls RHEL 9 | 0:3.8.3-10.el9_7 | [RHSA-2026:4188](https://patchblox.com/security/data/fix/linux/rhsa-2026-4188.md) | Mar 12, 2026 | | Linux | gnutls almalinux 10 | 3.8.10-3.el10_1 | [ALSA-2026:3477](https://patchblox.com/security/data/fix/linux/alsa-2026-3477.md) | Mar 2, 2026 | | Linux | gnutls almalinux 8 | 3.6.16-8.el8_10.5 | [ALSA-2026:5585](https://patchblox.com/security/data/fix/linux/alsa-2026-5585.md) | Mar 24, 2026 | | Linux | gnutls almalinux 9 | 3.8.3-10.el9_7 | [ALSA-2026:4188](https://patchblox.com/security/data/fix/linux/alsa-2026-4188.md) | Mar 10, 2026 | | Linux | gnutls ol 10 | 0:3.8.10-3.el10_1 | [ELSA-2026-3477](https://patchblox.com/security/data/fix/linux/elsa-2026-3477.md) | Mar 2, 2026 | | Linux | gnutls ol 8 | 0:3.6.16-8.el8_10.5 | [ELSA-2026-5585](https://patchblox.com/security/data/fix/linux/elsa-2026-5585.md) | Mar 24, 2026 | | Linux | gnutls ol 9 | 0:3.8.3-10.el9_7 | [ELSA-2026-4188](https://patchblox.com/security/data/fix/linux/elsa-2026-4188.md) | Mar 11, 2026 | | Linux | gnutls opensuse-leap 15.6 | 3.8.3-150600.4.12.1 | [SUSE-SU-2025:4323-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4323-1.md) | Dec 8, 2025 | | Linux | gnutls opensuse-leap 16.0 | 3.8.10-160000.2.1 | [OPENSUSE-SU-2026:20446-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20446-1.md) | Mar 30, 2026 | | Linux | gnutls rocky 10 | 0:3.8.10-3.el10_1 | [RLSA-2026:3477](https://patchblox.com/security/data/fix/linux/rlsa-2026-3477.md) | Mar 5, 2026 | | Linux | gnutls rocky 8 | 0:3.6.16-8.el8_10.5 | [RLSA-2026:5585](https://patchblox.com/security/data/fix/linux/rlsa-2026-5585.md) | Apr 7, 2026 | | Linux | gnutls rocky 9 | 0:3.8.3-10.el9_7 | [RLSA-2026:4188](https://patchblox.com/security/data/fix/linux/rlsa-2026-4188.md) | Mar 11, 2026 | | Linux | gnutls sles 15.6 | 3.8.3-150600.4.12.1 | [SUSE-SU-2025:4323-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4323-1.md) | Dec 8, 2025 | | Linux | gnutls sles 15.7 | 3.8.3-150600.4.12.1 | [SUSE-SU-2025:4323-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4323-1.md) | Dec 8, 2025 | | Linux | gnutls sles 16.0 | 3.8.10-160000.2.1 | [SUSE-SU-2026:20984-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20984-1.md) | Mar 30, 2026 | | Linux | gnutls-bin Ubuntu 18.04.6 LTS (bionic) | 3.5.18-1ubuntu1.6+esm3 | [gnutls-bin 3.5.18-1ubuntu1.6+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-gnutls-bin-3.5.18-1ubuntu1.6-esm3.md) | May 4, 2026 | | Linux | gnutls-bin Ubuntu 20.04 LTS (focal) | 3.6.13-2ubuntu1.12+esm2 | [gnutls-bin 3.6.13-2ubuntu1.12+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gnutls-bin-3.6.13-2ubuntu1.12-esm2.md) | May 7, 2026 | | Linux | gnutls-bin Ubuntu 22.04.1 LTS (jammy) | 3.7.3-4ubuntu1.8 | [gnutls-bin 3.7.3-4ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gnutls-bin-3.7.3-4ubuntu1.8.md) | Feb 9, 2026 | | Linux | gnutls-bin Ubuntu 24.04.5 LTS (noble) | 3.8.3-1.1ubuntu3.5 | [gnutls-bin 3.8.3-1.1ubuntu3.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gnutls-bin-3.8.3-1.1ubuntu3.5.md) | Feb 9, 2026 | | Linux | gnutls-bin Ubuntu 25.10 (questing) | 3.8.9-3ubuntu2.1 | [gnutls-bin 3.8.9-3ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-gnutls-bin-3.8.9-3ubuntu2.1.md) | Feb 9, 2026 | | Linux | gnutls-c++ RHEL 8 | 0:3.6.16-8.el8_10.5 | [RHSA-2026:5585](https://patchblox.com/security/data/fix/linux/rhsa-2026-5585.md) | Apr 15, 2026 | | Linux | gnutls-c++ RHEL 9 | 0:3.8.3-10.el9_7 | [RHSA-2026:4188](https://patchblox.com/security/data/fix/linux/rhsa-2026-4188.md) | Mar 12, 2026 | | Linux | gnutls-c++ almalinux 10 | 3.8.10-3.el10_1 | [ALSA-2026:3477](https://patchblox.com/security/data/fix/linux/alsa-2026-3477.md) | Mar 2, 2026 | | Linux | gnutls-c++ almalinux 8 | 3.6.16-8.el8_10.5 | [ALSA-2026:5585](https://patchblox.com/security/data/fix/linux/alsa-2026-5585.md) | Mar 24, 2026 | | Linux | gnutls-c++ almalinux 9 | 3.8.3-10.el9_7 | [ALSA-2026:4188](https://patchblox.com/security/data/fix/linux/alsa-2026-4188.md) | Mar 10, 2026 | | Linux | gnutls-c++ ol 10 | 0:3.8.10-3.el10_1 | [ELSA-2026-3477](https://patchblox.com/security/data/fix/linux/elsa-2026-3477.md) | Mar 2, 2026 | | Linux | gnutls-c++ ol 8 | 0:3.6.16-8.el8_10.5 | [ELSA-2026-5585](https://patchblox.com/security/data/fix/linux/elsa-2026-5585.md) | Mar 24, 2026 | | Linux | gnutls-c++ ol 9 | 0:3.8.3-10.el9_7 | [ELSA-2026-4188](https://patchblox.com/security/data/fix/linux/elsa-2026-4188.md) | Mar 11, 2026 | | Linux | gnutls-dane RHEL 8 | 0:3.6.16-8.el8_10.5 | [RHSA-2026:5585](https://patchblox.com/security/data/fix/linux/rhsa-2026-5585.md) | Apr 15, 2026 | | Linux | gnutls-dane RHEL 9 | 0:3.8.3-10.el9_7 | [RHSA-2026:4188](https://patchblox.com/security/data/fix/linux/rhsa-2026-4188.md) | Mar 12, 2026 | | Linux | gnutls-dane almalinux 10 | 3.8.10-3.el10_1 | [ALSA-2026:3477](https://patchblox.com/security/data/fix/linux/alsa-2026-3477.md) | Mar 2, 2026 | | Linux | gnutls-dane almalinux 8 | 3.6.16-8.el8_10.5 | [ALSA-2026:5585](https://patchblox.com/security/data/fix/linux/alsa-2026-5585.md) | Mar 24, 2026 | | Linux | gnutls-dane almalinux 9 | 3.8.3-10.el9_7 | [ALSA-2026:4188](https://patchblox.com/security/data/fix/linux/alsa-2026-4188.md) | Mar 10, 2026 | | Linux | gnutls-dane ol 10 | 0:3.8.10-3.el10_1 | [ELSA-2026-3477](https://patchblox.com/security/data/fix/linux/elsa-2026-3477.md) | Mar 2, 2026 | | Linux | gnutls-dane ol 8 | 0:3.6.16-8.el8_10.5 | [ELSA-2026-5585](https://patchblox.com/security/data/fix/linux/elsa-2026-5585.md) | Mar 24, 2026 | | Linux | gnutls-dane ol 9 | 0:3.8.3-10.el9_7 | [ELSA-2026-4188](https://patchblox.com/security/data/fix/linux/elsa-2026-4188.md) | Mar 11, 2026 | | Linux | gnutls-devel RHEL 8 | 0:3.6.16-8.el8_10.5 | [RHSA-2026:5585](https://patchblox.com/security/data/fix/linux/rhsa-2026-5585.md) | Apr 15, 2026 | | Linux | gnutls-devel RHEL 9 | 0:3.8.3-10.el9_7 | [RHSA-2026:4188](https://patchblox.com/security/data/fix/linux/rhsa-2026-4188.md) | Mar 12, 2026 | | Linux | gnutls-devel almalinux 10 | 3.8.10-3.el10_1 | [ALSA-2026:3477](https://patchblox.com/security/data/fix/linux/alsa-2026-3477.md) | Mar 2, 2026 | | Linux | gnutls-devel almalinux 8 | 3.6.16-8.el8_10.5 | [ALSA-2026:5585](https://patchblox.com/security/data/fix/linux/alsa-2026-5585.md) | Mar 24, 2026 | | Linux | gnutls-devel almalinux 9 | 3.8.3-10.el9_7 | [ALSA-2026:4188](https://patchblox.com/security/data/fix/linux/alsa-2026-4188.md) | Mar 10, 2026 | | Linux | gnutls-devel ol 10 | 0:3.8.10-3.el10_1 | [ELSA-2026-3477](https://patchblox.com/security/data/fix/linux/elsa-2026-3477.md) | Mar 2, 2026 | | Linux | gnutls-devel ol 8 | 0:3.6.16-8.el8_10.5 | [ELSA-2026-5585](https://patchblox.com/security/data/fix/linux/elsa-2026-5585.md) | Mar 24, 2026 | | Linux | gnutls-devel ol 9 | 0:3.8.3-10.el9_7 | [ELSA-2026-4188](https://patchblox.com/security/data/fix/linux/elsa-2026-4188.md) | Mar 11, 2026 | | Linux | gnutls-fips almalinux 10 | 3.8.10-3.el10_1 | [ALSA-2026:3477](https://patchblox.com/security/data/fix/linux/alsa-2026-3477.md) | Mar 2, 2026 | | Linux | gnutls-fips ol 10 | 0:3.8.10-3.el10_1 | [ELSA-2026-3477](https://patchblox.com/security/data/fix/linux/elsa-2026-3477.md) | Mar 2, 2026 | | Linux | gnutls-utils RHEL 8 | 0:3.6.16-8.el8_10.5 | [RHSA-2026:5585](https://patchblox.com/security/data/fix/linux/rhsa-2026-5585.md) | Apr 15, 2026 | | Linux | gnutls-utils RHEL 9 | 0:3.8.3-10.el9_7 | [RHSA-2026:4188](https://patchblox.com/security/data/fix/linux/rhsa-2026-4188.md) | Mar 12, 2026 | | Linux | gnutls-utils almalinux 10 | 3.8.10-3.el10_1 | [ALSA-2026:3477](https://patchblox.com/security/data/fix/linux/alsa-2026-3477.md) | Mar 2, 2026 | | Linux | gnutls-utils almalinux 8 | 3.6.16-8.el8_10.5 | [ALSA-2026:5585](https://patchblox.com/security/data/fix/linux/alsa-2026-5585.md) | Mar 24, 2026 | | Linux | gnutls-utils almalinux 9 | 3.8.3-10.el9_7 | [ALSA-2026:4188](https://patchblox.com/security/data/fix/linux/alsa-2026-4188.md) | Mar 10, 2026 | | Linux | gnutls-utils ol 10 | 0:3.8.10-3.el10_1 | [ELSA-2026-3477](https://patchblox.com/security/data/fix/linux/elsa-2026-3477.md) | Mar 2, 2026 | | Linux | gnutls-utils ol 8 | 0:3.6.16-8.el8_10.5 | [ELSA-2026-5585](https://patchblox.com/security/data/fix/linux/elsa-2026-5585.md) | Mar 24, 2026 | | Linux | gnutls-utils ol 9 | 0:3.8.3-10.el9_7 | [ELSA-2026-4188](https://patchblox.com/security/data/fix/linux/elsa-2026-4188.md) | Mar 11, 2026 | | Linux | gnutls28 Debian 12.15 (bookworm) | 3.7.9-2+deb12u6 | [DEBIAN-CVE-2025-9820](https://patchblox.com/security/data/fix/linux/debian-cve-2025-9820.md) | Jan 26, 2026 | | Linux | gnutls28 Debian 13.5 (trixie) | 3.8.9-3+deb13u1 | [DEBIAN-CVE-2025-9820](https://patchblox.com/security/data/fix/linux/debian-cve-2025-9820.md) | Jan 26, 2026 | | Linux | gnutls28 Debian 14 | 3.8.11-3 | [DEBIAN-CVE-2025-9820](https://patchblox.com/security/data/fix/linux/debian-cve-2025-9820.md) | Jan 26, 2026 | | Linux | guile-gnutls Ubuntu 20.04 LTS (focal) | 3.6.13-2ubuntu1.12+esm2 | [guile-gnutls 3.6.13-2ubuntu1.12+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-guile-gnutls-3.6.13-2ubuntu1.12-esm2.md) | May 7, 2026 | | Linux | guile-gnutls Ubuntu 22.04.1 LTS (jammy) | 3.7.3-4ubuntu1.8 | [guile-gnutls 3.7.3-4ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-guile-gnutls-3.7.3-4ubuntu1.8.md) | Feb 9, 2026 | | Linux | libgnutls-dane0 Ubuntu 18.04.6 LTS (bionic) | 3.5.18-1ubuntu1.6+esm3 | [libgnutls-dane0 3.5.18-1ubuntu1.6+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libgnutls-dane0-3.5.18-1ubuntu1.6-esm3.md) | May 4, 2026 | | Linux | libgnutls-dane0 Ubuntu 20.04 LTS (focal) | 3.6.13-2ubuntu1.12+esm2 | [libgnutls-dane0 3.6.13-2ubuntu1.12+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libgnutls-dane0-3.6.13-2ubuntu1.12-esm2.md) | May 7, 2026 | | Linux | libgnutls-dane0 Ubuntu 22.04.1 LTS (jammy) | 3.7.3-4ubuntu1.8 | [libgnutls-dane0 3.7.3-4ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libgnutls-dane0-3.7.3-4ubuntu1.8.md) | Feb 9, 2026 | | Linux | libgnutls-dane0t64 Ubuntu 24.04.5 LTS (noble) | 3.8.3-1.1ubuntu3.5 | [libgnutls-dane0t64 3.8.3-1.1ubuntu3.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libgnutls-dane0t64-3.8.3-1.1ubuntu3.5.md) | Feb 9, 2026 | | Linux | libgnutls-dane0t64 Ubuntu 25.10 (questing) | 3.8.9-3ubuntu2.1 | [libgnutls-dane0t64 3.8.9-3ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libgnutls-dane0t64-3.8.9-3ubuntu2.1.md) | Feb 9, 2026 | | Linux | libgnutls-openssl27 Ubuntu 18.04.6 LTS (bionic) | 3.5.18-1ubuntu1.6+esm3 | [libgnutls-openssl27 3.5.18-1ubuntu1.6+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libgnutls-openssl27-3.5.18-1ubuntu1.6-esm3.md) | May 4, 2026 | | Linux | libgnutls-openssl27 Ubuntu 20.04 LTS (focal) | 3.6.13-2ubuntu1.12+esm2 | [libgnutls-openssl27 3.6.13-2ubuntu1.12+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libgnutls-openssl27-3.6.13-2ubuntu1.12-esm2.md) | May 7, 2026 | | Linux | libgnutls-openssl27 Ubuntu 22.04.1 LTS (jammy) | 3.7.3-4ubuntu1.8 | [libgnutls-openssl27 3.7.3-4ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libgnutls-openssl27-3.7.3-4ubuntu1.8.md) | Feb 9, 2026 | | Linux | libgnutls-openssl27t64 Ubuntu 24.04.5 LTS (noble) | 3.8.3-1.1ubuntu3.5 | [libgnutls-openssl27t64 3.8.3-1.1ubuntu3.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libgnutls-openssl27t64-3.8.3-1.1ubuntu3.5.md) | Feb 9, 2026 | | Linux | libgnutls-openssl27t64 Ubuntu 25.10 (questing) | 3.8.9-3ubuntu2.1 | [libgnutls-openssl27t64 3.8.9-3ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libgnutls-openssl27t64-3.8.9-3ubuntu2.1.md) | Feb 9, 2026 | | Linux | libgnutls30 Ubuntu 18.04.6 LTS (bionic) | 3.5.18-1ubuntu1.6+esm3 | [libgnutls30 3.5.18-1ubuntu1.6+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libgnutls30-3.5.18-1ubuntu1.6-esm3.md) | May 4, 2026 | | Linux | libgnutls30 Ubuntu 20.04 LTS (focal) | 3.6.13-2ubuntu1.12+esm2 | [libgnutls30 3.6.13-2ubuntu1.12+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libgnutls30-3.6.13-2ubuntu1.12-esm2.md) | May 7, 2026 | | Linux | libgnutls30 Ubuntu 22.04.1 LTS (jammy) | 3.7.3-4ubuntu1.8 | [libgnutls30 3.7.3-4ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libgnutls30-3.7.3-4ubuntu1.8.md) | Feb 9, 2026 | | Linux | libgnutls30t64 Ubuntu 24.04.5 LTS (noble) | 3.8.3-1.1ubuntu3.5 | [libgnutls30t64 3.8.3-1.1ubuntu3.5](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libgnutls30t64-3.8.3-1.1ubuntu3.5.md) | Feb 9, 2026 | | Linux | libgnutls30t64 Ubuntu 25.10 (questing) | 3.8.9-3ubuntu2.1 | [libgnutls30t64 3.8.9-3ubuntu2.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libgnutls30t64-3.8.9-3ubuntu2.1.md) | Feb 9, 2026 | | Linux | libgnutlsxx28 Ubuntu 18.04.6 LTS (bionic) | 3.5.18-1ubuntu1.6+esm3 | [libgnutlsxx28 3.5.18-1ubuntu1.6+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libgnutlsxx28-3.5.18-1ubuntu1.6-esm3.md) | May 4, 2026 | | Linux | libgnutlsxx28 Ubuntu 20.04 LTS (focal) | 3.6.13-2ubuntu1.12+esm2 | [libgnutlsxx28 3.6.13-2ubuntu1.12+esm2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libgnutlsxx28-3.6.13-2ubuntu1.12-esm2.md) | May 7, 2026 | | Linux | libgnutlsxx28 Ubuntu 22.04.1 LTS (jammy) | 3.7.3-4ubuntu1.8 | [libgnutlsxx28 3.7.3-4ubuntu1.8](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libgnutlsxx28-3.7.3-4ubuntu1.8.md) | Feb 9, 2026 | --- Data as of 2026-11-08T06:59:42Z UTC. 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