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{"bugzilla": {"description": "clevis: clevis: integer underflow in PKCS#11 data socket handler crashes daemon on unbound client connection", "id": "2550375", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550375"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the clevis PKCS#11 pin. The clevis-pkcs11-afunix-socket-unlock daemon crashes when an AF_UNIX client connects to the data socket without a bound address, due to an integer underflow in the getpeername result handling. This causes a denial of service, preventing LUKS disk decryption from completing during boot."], "mitigation": {"lang": "en:us", "value": "No additional end-user mitigation is needed. Under the default systemd configuration, the data socket is only accessible by root, preventing unprivileged users from triggering the crash."}, "name": "CVE-2026-109976", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "clevis", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "clevis", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "clevis", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "clevis", "product_name": "Red Hat Enterprise Linux 9"}, {"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": "2026-10-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-109976\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-109976"], "statement": "The PKCS#11 clevis pin is an opt-in feature requiring explicit configuration (clevis luks bind pkcs11), PKCS#11 hardware, and activation of the corresponding systemd service or dracut module. Default clevis installations are not affected.\nRed Hat rates this Moderate because under the default systemd UMask of 0022, the data socket is created with mode 0755. AF_UNIX SOCK_STREAM requires write permission to connect, so only root can reach the vulnerable code path. Since the daemon itself runs as root, this does not cross a privilege boundary. The crash is a denial of service only \u2014 _FORTIFY_SOURCE and stack canaries independently prevent code execution.", "threat_severity": "Low"}

{"created": "2026-10-13T14:30:08.478825+00:00", "updated": "2026-10-13T14:30:08.478920+00:00", "vendors": []}