CVE-2021-27365

Public Exploit

Description

An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. An unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.29%
Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html third party advisory mailing list
https://www.oracle.com/security-alerts/cpuoct2021.html third party advisory patch
https://www.openwall.com/lists/oss-security/2021/03/06/1 third party advisory mailing list
https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html third party advisory exploit
http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html third party advisory vdb entry
https://security.netapp.com/advisory/ntap-20210409-0001/ third party advisory
https://bugzilla.suse.com/show_bug.cgi?id=1182715 third party advisory issue tracking
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ec98ea7070e94cc25a422ec97d1421e28d97b7ee patch vendor advisory mailing list
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f9dbdf97a5bd92b1a49cee3d591b55b11fd7a6d5 patch vendor advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-27365?
CVE-2021-27365 has been scored as a high severity vulnerability.
How to fix CVE-2021-27365?
To fix CVE-2021-27365, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-27365 being actively exploited in the wild?
It is possible that CVE-2021-27365 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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