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cvelistMitreCVELIST:CVE-2021-27363
HistoryMar 07, 2021 - 3:55 a.m.

CVE-2021-27363

2021-03-0703:55:58
mitre
www.cve.org
3

AI Score

6.2

Confidence

High

EPSS

0.001

Percentile

25.8%

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.