CVE-2026-94055

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{"bugzilla": {"description": "exim: gnutls: Exim: Use-after-free vulnerability in GnuTLS TLS settings leading to denial of service", "id": "2538399", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2538399"}, "csaw": false, "cwe": "CWE-416", "details": ["Exim before 4.100.1, when certain non-default TLS settings are used with GnuTLS, has a use-after-free.", "A flaw was found in Exim. When certain non-default TLS (Transport Layer Security) settings are used with GnuTLS, a use-after-free vulnerability exists. This flaw could allow a remote attacker to trigger a system crash, leading to a denial of service."], "mitigation": {"lang": "en:us", "value": "Disable the non-default tls_early_banner_hosts setting in Exim configurations where it is enabled."}, "name": "CVE-2026-94055", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-19T22:48:57Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-94055\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-94055\nhttps://lists.exim.org/lurker/message/20260918.121220.0f87338e.en.html"], "statement": "This flaw has a Low impact in Exim deployments using GnuTLS when TLS-on-connect is accepted and the non-default tls_early_banner_hosts setting is enabled. Under those conditions, a remote unauthenticated attacker may trigger a use-after-free and cause a denial of service. Red Hat is assessing whether shipped product configurations meet these preconditions.", "threat_severity": "Low"}

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