# Gnutls: stack-based buffer overflow in gnutls_pkcs11_token_init() function CVE record · `CVE-2025-9820` - **Identifiers:** `CVE-2025-9820` - **State:** Confirmed - **Severity:** CVSS 4.0 Medium - **Critical:** No - **CNA:** redhat - **Weakness (CWE):** [CWE-121](https://cwe.mitre.org/data/definitions/121.html) - **Tags:** [Memory corruption](https://agentprime.io/advisories/tag/memory-corruption.md) - **Technologies:** [Red Hat Enterprise Linux 10](https://agentprime.io/advisories/technology/red-hat-enterprise-linux-10.md) · [Red Hat Enterprise Linux 8](https://agentprime.io/advisories/technology/red-hat-enterprise-linux-8.md) · [Red Hat Enterprise Linux 9](https://agentprime.io/advisories/technology/red-hat-enterprise-linux-9.md) · [Red Hat RHEL-8 based Middleware Containers](https://agentprime.io/advisories/technology/red-hat-rhel-8-based-middleware-containers.md) · [Cert Manager support for Red Hat OpenShift release 1.18](https://agentprime.io/advisories/technology/cert-manager-support-for-red-hat-openshift-release-1-18.md) · [Red Hat Ceph Storage 8](https://agentprime.io/advisories/technology/red-hat-ceph-storage-8.md) · [Red Hat Discovery 2](https://agentprime.io/advisories/technology/red-hat-discovery-2.md) · [Red Hat Hardened Images](https://agentprime.io/advisories/technology/red-hat-hardened-images.md) · [Red Hat Insights proxy 1.5](https://agentprime.io/advisories/technology/red-hat-insights-proxy-1-5.md) · [Red Hat Update Infrastructure 5](https://agentprime.io/advisories/technology/red-hat-update-infrastructure-5.md) · [Red Hat Enterprise Linux 6](https://agentprime.io/advisories/technology/red-hat-enterprise-linux-6.md) · [Red Hat Enterprise Linux 7](https://agentprime.io/advisories/technology/red-hat-enterprise-linux-7.md) · [Red Hat OpenShift Container Platform 4](https://agentprime.io/advisories/technology/red-hat-openshift-container-platform-4.md) - **Published:** 26 Jan 2026 - **Updated:** 14 Oct 2026 - **Reviewed by a person:** No Published by the CVE Program (CNA: redhat) at 26 Jan 2026, 19:58 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. ## Affected products, as the CNA wrote them - Vendor: Not given. Product: Not given. - affected: `3.8.1` - affected: `3.8.2` - affected: `3.8.3` - affected: `3.8.4` - affected: `3.8.5` - affected: `3.8.6` - affected: `3.8.7` - affected: `3.8.8` - affected: `3.8.9` - affected: `3.8.10` - Package name: `gnutls` - Collection: `https://gitlab.com/gnutls/gnutls` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 10. - unaffected: `0:3.8.10-3.el10_1 to before *` (rpm) - Other versions: affected - Package name: `gnutls` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 8. - unaffected: `0:3.6.16-8.el8_10.5 to before *` (rpm) - Other versions: affected - Package name: `gnutls` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 8. - unaffected: `0:3.6.16-8.el8_10.5 to before *` (rpm) - Other versions: affected - Package name: `gnutls` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 9. - unaffected: `0:3.8.3-10.el9_7 to before *` (rpm) - Other versions: affected - Package name: `gnutls` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 9. - unaffected: `0:3.8.3-10.el9_7 to before *` (rpm) - Other versions: affected - Package name: `gnutls` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: RHEL-8 based Middleware Containers. - unaffected: `7.13.5-4.1777325677 to before *` (rpm) - Other versions: affected - Package name: `rhpam-7/rhpam-businesscentral-monitoring-rhel8` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: RHEL-8 based Middleware Containers. - unaffected: `7.13.5-4.1777325711 to before *` (rpm) - Other versions: affected - Package name: `rhpam-7/rhpam-businesscentral-rhel8` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: RHEL-8 based Middleware Containers. - unaffected: `7.13.5-4.1777325710 to before *` (rpm) - Other versions: affected - Package name: `rhpam-7/rhpam-controller-rhel8` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: RHEL-8 based Middleware Containers. - unaffected: `7.13.5-3.1777325680 to before *` (rpm) - Other versions: affected - Package name: `rhpam-7/rhpam-dashbuilder-rhel8` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: RHEL-8 based Middleware Containers. - unaffected: `7.13.5-4.1777325709 to before *` (rpm) - Other versions: affected - Package name: `rhpam-7/rhpam-kieserver-rhel8` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: RHEL-8 based Middleware Containers. - unaffected: `7.13.5-4.1777325680 to before *` (rpm) - Other versions: affected - Package name: `rhpam-7/rhpam-process-migration-rhel8` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: RHEL-8 based Middleware Containers. - unaffected: `7.13.5-4.1777325708 to before *` (rpm) - Other versions: affected - Package name: `rhpam-7/rhpam-smartrouter-rhel8` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Cert Manager support for Red Hat OpenShift release 1.18. - unaffected: `1791459707 to before *` (rpm) - Other versions: affected - Package name: `cert-manager/jetstack-cert-manager-acmesolver-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Cert Manager support for Red Hat OpenShift release 1.18. - unaffected: `1791459711 to before *` (rpm) - Other versions: affected - Package name: `cert-manager/jetstack-cert-manager-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Cert Manager support for Red Hat OpenShift release 1.18. - unaffected: `1791459759 to before *` (rpm) - Other versions: affected - Package name: `cert-manager/cert-manager-istio-csr-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Cert Manager support for Red Hat OpenShift release 1.18. - unaffected: `1789029076 to before *` (rpm) - Other versions: affected - Package name: `cert-manager/cert-manager-operator-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Cert Manager support for Red Hat OpenShift release 1.18. - unaffected: `1791966259 to before *` (rpm) - Other versions: affected - Package name: `cert-manager/cert-manager-operator-bundle` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat Ceph Storage 8. - unaffected: `1774002867 to before *` (rpm) - Other versions: affected - Package name: `rhceph/rhceph-8-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat Discovery 2. - unaffected: `1775668717 to before *` (rpm) - Other versions: affected - Package name: `discovery/discovery-server-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat Discovery 2. - unaffected: `1775675922 to before *` (rpm) - Other versions: affected - Package name: `discovery/discovery-ui-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat Hardened Images. - unaffected: `3.8.12-1.1.hum1 to before *` (rpm) - Other versions: affected - Package name: `gnutls-main` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat Insights proxy 1.5. - unaffected: `1773685509 to before *` (rpm) - Other versions: affected - Package name: `insights-proxy/insights-proxy-container-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat Update Infrastructure 5. - unaffected: `1773670073 to before *` (rpm) - Other versions: affected - Package name: `rhui5/cds-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat Update Infrastructure 5. - unaffected: `1773672059 to before *` (rpm) - Other versions: affected - Package name: `rhui5/haproxy-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat Update Infrastructure 5. - unaffected: `1773668803 to before *` (rpm) - Other versions: affected - Package name: `rhui5/installer-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat Update Infrastructure 5. - unaffected: `1773670137 to before *` (rpm) - Other versions: affected - Package name: `rhui5/rhua-rhel9` - Collection: `https://catalog.redhat.com/software/containers/` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 6. - No versions given - Other versions: affected - Package name: `gnutls` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat Enterprise Linux 7. - No versions given - Other versions: affected - Package name: `gnutls` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat OpenShift Container Platform 4. - No versions given - Other versions: affected - Package name: `openshift/ose-rhel-coreos-8` - Collection: `https://access.redhat.com/downloads/content/package-browser/` - Vendor: Red Hat. Product: Red Hat OpenShift Container Platform 4. - No versions given - Other versions: affected - Package name: `openshift/ose-rhel-coreos-9` - Collection: `https://access.redhat.com/downloads/content/package-browser/` ## Not analysed yet We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter. ## Severity and exploitation - 4.0 Medium, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`, from CNA (redhat) - **CISA KEV:** Not listed. - **EPSS:** 0.0022, the 12th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline This record came from the full history of the CVE Program, published 26 Jan 2026. New records show when each source confirmed them. ## Sources - [CVE List: CVE-2025-9820](https://www.cve.org/CVERecord?id=CVE-2025-9820) - [NVD: CVE-2025-9820](https://nvd.nist.gov/vuln/detail/CVE-2025-9820) ### References from the CNA - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vendor-advisory, redhat) - (vdb-entry, redhat) - (issue-tracking, redhat) - - - Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description. ## Check whether this affects you This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run. - With the agentprime MCP server (), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: - As JSON: - Everything that needs attention now: --- The web page: . Everything for agents: .