CyberRota Analysis
AI-GeneratedThe vulnerability in the Linux kernel affects systems utilizing the s390/zcrypt subsystem, where a user-controlled value can be exploited due to inadequate speculative execution barriers. This flaw may allow an attacker to manipulate memory access patterns, potentially leading to unauthorized data exposure. Organizations using affected Linux distributions, particularly those with custom device nodes or administrative loads, should prioritize remediation to mitigate the risk of speculative execution attacks.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Close speculative mem read possibility The domain value is extracted from a given CCA or EP11 ioctl struct when a CPRB is about to be sent. Thus this is a user controlled value. Under some special conditions (custom device node used, administrative load) this value is used as an array index after bounds checking, but without speculation barrier. Add the missing array_index_nospec() call to prevent speculative execution where this domain value is used.