{"id":"CVE-2026-74466","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Close speculative mem read possibility\n\nThe domain value is extracted from a given CCA or EP11 ioctl struct\nwhen a CPRB is about to be sent","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Close speculative mem read possibility\n\nThe domain value is extracted from a given CCA or EP11 ioctl struct\nwhen a CPRB is about to be sent. Thus this is a…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < 59adeedebf02aa1c203de1d2b67ec45bfab7a3c6","Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < 82b62eda68abfb7a33ac40f24b8c4128c2891148","Linux >= cfd68b33094e1a92249850ff3c3c92ae9112a541 < e935cd525af4c6ed2e2c6404aa27ca19c7f39ddb","Linux 5.18"],"published":"2026-08-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:17:46.410","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74466","references":[{"url":"https://git.kernel.org/stable/c/59adeedebf02aa1c203de1d2b67ec45bfab7a3c6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/82b62eda68abfb7a33ac40f24b8c4128c2891148","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e935cd525af4c6ed2e2c6404aa27ca19c7f39ddb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00216,"epssPercentile":0.1121,"ingestedAt":"2026-10-15T11:00:41.674Z","slug":"CVE-2026-74466","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Close speculative mem read possibility\n\nThe domain value is extracted from a given CCA or EP11 ioctl struct\nwhen a CPRB is about to be sent. Thus this is a user controlled value.\nUnder some special conditions (custom device node used, administrative\nload) this value is used as an array index after bounds checking, but\nwithout speculation barrier.\n\nAdd the missing array_index_nospec() call to prevent speculative\nexecution where this domain value is used.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}