CVE-2021-27363

Description

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.

Weakness classification

• nvd@nist.gov: NVD-CWE-noinfo

Primary references

• cve@mitre.org — Third Party Advisory, VDB Entry
• cve@mitre.org — Mailing List, Patch, Third Party Advisory
• cve@mitre.org — Exploit, Third Party Advisory
• cve@mitre.org — Issue Tracking, Third Party Advisory
• cve@mitre.org — Mailing List, Patch, Vendor Advisory
• cve@mitre.org — Mailing List, Third Party Advisory
• cve@mitre.org — Third Party Advisory
• cve@mitre.org — Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry
• af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch, Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Third Party Advisory