CVE-2021-27363
lowpriority · track · 18EPSS 0.007 · 53 %ileEURUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 3.6–7.3
weaknesses
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affected products (45)
Products and version ranges known to be affected.
also known as (5)
Other names and identifiers for this entity.
sources
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references (71)
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2021/03/06/1cnnvd
- https://access.redhat.com/security/cve/cve-2021-27363cnnvd
- https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.htmlcnnvd
- https://bugzilla.suse.com/show_bug.cgi?id=1182716cnnvd
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aacnnvd
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlcnnvd
- https://lists.debian.org/debian-lts-announce/2021/03/msg00035.htmlcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-27363cnnvd
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