{"id":"CVE-2026-80543","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Pad trailing CCA or EP11 message with zeros\n\nThe both functions xcrb_msg_to_type6cprb_msgx() and\nxcrb_msg_to_type6_ep11cprb_msgx() copy the user space mess…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Pad trailing CCA or EP11 message with zeros\n\nThe both functions xcrb_msg_to_type6cprb_msgx() and\nxcrb_msg_to_type6_ep11cprb_msgx() copy the user space mess…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 20b0b0159390fa5c00a435195649680fefda81e0 < 44e61f1834831f873af5a4fec5a5e432b929c6a2","Linux >= e2c6d91eb8b1533753755f07803e47eceed263d0 < 2db92a56b000173d332b6c30f38a5a4444e4355a","Linux >= e2c6d91eb8b1533753755f07803e47eceed263d0 < eb363254472493e3458156fc11fd56dca92f4333","Linux 7.1"],"published":"2026-08-26","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:17:50.663","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80543","references":[{"url":"https://git.kernel.org/stable/c/2db92a56b000173d332b6c30f38a5a4444e4355a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/44e61f1834831f873af5a4fec5a5e432b929c6a2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eb363254472493e3458156fc11fd56dca92f4333","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00198,"epssPercentile":0.08864,"ingestedAt":"2026-10-15T11:00:41.667Z","slug":"CVE-2026-80543","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Pad trailing CCA or EP11 message with zeros\n\nThe both functions xcrb_msg_to_type6cprb_msgx() and\nxcrb_msg_to_type6_ep11cprb_msgx() copy the user space message into a\nkernel buffer based on the message length. But on further processing\nthe message is supposed to be 4 byte length adjusted. Thus up to 3\nbytes of uninitialized kernel memory are forwarded to further\nprocessing steps and may unwanted expose kernel memory to the crypto\ncard firmware.\n\nThis patch contains code to pad the gap between user space copied\nmessage and message buffer length sent down to further processing of\nthe CCA or EP11 message to zeros.\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":[]}