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{"acknowledgement": "This issue was discovered by Found by AISLE in partnership with Red Hat.", "bugzilla": {"description": "sssd: SSSD: Local denial of service due to NULL pointer dereference in PAM responder", "id": "2479464", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479464"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in SSSD (System Security Services Daemon). A local attacker with privileges to connect to the PAM (Pluggable Authentication Modules) responder socket can send a specially crafted protocol request. If the `pam_app_services` configuration is enabled and the service item is omitted from the request, a NULL pointer dereference can occur. This vulnerability leads to a denial of service, causing the PAM responder to crash and disrupt authentication services."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, avoid configuring `pam_app_services` in the `[pam]` section of `/etc/sssd/sssd.conf` if it is not operationally required. If `pam_app_services` is configured, remove or comment out the `pam_app_services` line and restart the `sssd` service.\nExample:\n```\n# /etc/sssd/sssd.conf\n[pam]\n# pam_app_services = app_svc\n```\nAfter modifying the configuration, restart the SSSD service:\n`systemctl restart sssd`\nNote that restarting the SSSD service may temporarily interrupt authentication and authorization services."}, "name": "CVE-2026-90995", "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": "2026-09-14T14:40:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-90995\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-90995"], "statement": "This Moderate impact denial of service vulnerability in SSSD's PAM responder requires local access and a non-default `pam_app_services` configuration. An authenticated local attacker can send a crafted PAM request, leading to a NULL pointer dereference and crashing the PAM responder, thereby disrupting authentication services. The default SSSD configuration is not affected.", "threat_severity": "Moderate"}