NetSight
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medium4.4

CVE-2021-27363

An issue was discovered in the Linux kernel through 5.11.3.

Impact

An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
through 5.11.3
DebianDebian Linux
Version 9.0
NetappCloud Backup
All versions
NetappSolidfire Baseboard Management Controller Firmware
All versions

References