What is CVE-2021-27363?

CVE-2021-27363 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.4 out of 10. CVE-2021-27363 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-27363?

CVE-2021-27363 has a CVSS score of 4.4 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L.

Is there a patch available for CVE-2021-27363?

No patch is currently available for CVE-2021-27363. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-27363 actively exploited?

CVE-2021-27363 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-27363

Medium

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.

Package Linux Kernel

Published 2021-03-07

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

4.4

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

References

The following references provide additional information about CVE-2021-27363 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Packet Storm
http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html

Third Party Advisory VDB Entry
Blog
https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html

Exploit Third Party Advisory
SUSE
https://bugzilla.suse.com/show_bug.cgi?id=1182716

Issue Tracking Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html

Mailing List Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html

Third Party Advisory
Security
https://security.netapp.com/advisory/ntap-20210409-0001/

Third Party Advisory
Kernel patch commit
http://www.openwall.com/lists/oss-security/2021/03/06/1
Patch
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aa
Patch

Details

CVE ID CVE-2021-27363

Severity Medium

CVSS score 4.4 / 10

CVSS version 3.1

Published 2021-03-07

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-27363?

CVE-2021-27363 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.4 out of 10 . CVE-2021-27363 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-27363?

CVE-2021-27363 has a CVSS score of 4.4 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L.
Is there a patch available for CVE-2021-27363?

No patch is currently available for CVE-2021-27363. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-27363 actively exploited?

No — CVE-2021-27363 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.