CVE-2023-53464: 
Linux Kernel vulnerability analysis and mitigation

CVE-2023-53464 affects the Linux kernel, specifically related to the iSCSI TCP implementation. The vulnerability was discovered in the scsi: iscsitcp component, where the validity of sock needs to be checked before iscsiset_param() to avoid incorrect values (Ubuntu Security).

The vulnerability stems from a change introduced by commit 57569c37f0ad ("scsi: iscsi: iscsitcp: Fix null-ptr-deref while calling getpeername()") which may lead to inconsistent values of tcpswconn->sendpage and conn->datadgsten. The issue requires fixing by moving the position of the assignment (Ubuntu Security).

The vulnerability could result in incorrect values being assigned to critical parameters in the iSCSI TCP implementation, potentially affecting system stability and security (Ubuntu Security).

Fixes have been released for multiple affected versions, including linux-hwe-5.15 (5.15.0-79.86~20.04.2), linux-aws-5.15 (5.15.0-1041.46~20.04.1), linux-azure-5.15 (5.15.0-1045.52~20.04.1), linux-gcp-5.15 (5.15.0-1039.47~20.04.1), linux-ibm-5.15 (5.15.0-1036.39~20.04.1), and linux-intel-iotg-5.15 (5.15.0-1037.42~20.04.1) (Ubuntu Security).