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{"bugzilla": {"description": "sssd: sssd-kcm: Local Denial of Service via excessive memory preallocation", "id": "2479377", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479377"}, "csaw": false, "cwe": "CWE-770", "details": ["A flaw was found in `sssd-kcm`. A local user or process able to connect to the `sssd-kcm` UNIX socket can exploit this vulnerability. By sending a large request length header and then stalling the connection, an attacker can cause the system to preallocate significant memory. This leads to memory exhaustion within the `sssd-kcm` responder, resulting in a Denial of Service (DoS) for affected deployments."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-80048", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "sssd", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "sssd", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "sssd", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "sssd", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "sssd", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-06T20:07:58Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80048\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80048"], "statement": "This moderate impact local denial of service in `sssd-kcm` is due to excessive memory preallocation. Exploitation requires a local attacker to connect to the `sssd-kcm` UNIX socket, which is only possible if the `sssd-kcm` responder is enabled and permits local client connections. When successfully exploited the `sssd-kcm` process stops replying to any request, meaning any user depending on services like KRB5, GSSAPI, SASL, etc will be unable to authenticate to local or remote services, representing a full DoS of the system's Kerberos Cache Manager.\nThis vulnerability affects only systems with the `sssd-kcm` installed and configured, which is not enabled by default on `sssd` installations for Red Hat Enterprise Linux.", "threat_severity": "Moderate"}

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