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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.

🗓️ 16 Mar 2021 07:00:00Reported by MicrosoftType 
mscve
 mscve🔗 msrc.microsoft.com👁 2 Views

Kernel pointer leak in Linux through 5.11.3 exposes iscsi_transport address to unprivileged users.

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microsoftcbl2_kernel_5.10.78.1-1Range<5.10.78.1-1

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16 Dec 2021 08:00Current
7.8High risk
Vulners AI Score7.8
CVSS 23.6
CVSS 3.14.4
EPSS0.00711
linux kernelpointer leakiscsi transportsysfs exposureunprivileged users
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