CVE-2021-27363 log

Severity Medium
Remote No
Type Information disclosure
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. The issue is fixed in kernel versions 5.11.4 and 5.10.21.
Group Package Affected Fixed Severity Status Ticket
AVG-1655 linux-lts 5.10.20-1 5.10.21-1 Medium Fixed
AVG-1653 linux-zen 5.11.3.zen1-1 5.11.4.zen1-1 Medium Fixed
AVG-1651 linux 5.11.3.arch1-1 5.11.4.arch1-1 Medium Fixed
AVG-1645 linux-hardened 5.10.19.hardened1-1 5.10.21.hardened1-1 Medium Fixed