CVE-2021-3348

Description

nbd_add_socket in drivers/block/nbd.c in the Linux kernel through 5.10.12 has an ndb_queue_rq use-after-free that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup, aka CID-b98e762e3d71.

Category

7.0
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.09%
Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b98e762e3d71e893b221f871825dc64694cfb258 mailing list patch vendor advisory
https://www.openwall.com/lists/oss-security/2021/01/28/3 mailing list third party advisory patch
http://www.openwall.com/lists/oss-security/2021/02/01/1 mailing list third party advisory patch
https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-3348?
CVE-2021-3348 has been scored as a high severity vulnerability.
How to fix CVE-2021-3348?
To fix CVE-2021-3348, 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-2021-3348 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-3348 is being actively exploited. 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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