CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's handling of messages in the s390/zcrypt subsystem, where uninitialized kernel memory may be exposed to crypto card firmware due to improper message length adjustments. This could lead to potential information leakage, compromising the integrity and confidentiality of sensitive data. Organizations utilizing Linux systems with s390 architecture, particularly those relying on cryptographic operations, should prioritize applying the patch to mitigate this risk.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Pad trailing CCA or EP11 message with zeros The both functions xcrb_msg_to_type6cprb_msgx() and xcrb_msg_to_type6_ep11cprb_msgx() copy the user space message into a kernel buffer based on the message length. But on further processing the message is supposed to be 4 byte length adjusted. Thus up to 3 bytes of uninitialized kernel memory are forwarded to further processing steps and may unwanted expose kernel memory to the crypto card firmware. This patch contains code to pad the gap between user space copied message and message buffer length sent down to further processing of the CCA or EP11 message to zeros.