CVE-2021-3348

low-risk
Published 2021-02-01

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.

Do I need to act?

-
0.10% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.0/10 High
LOCAL / HIGH complexity

Affected Products (2)

Affected Vendors

Debian Linux

References (8)

Mailing List http://www.openwall.com/lists/oss-security/2021/02/01/1
Mailing List https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b9...
Third Party Advisory https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html
Mailing List https://www.openwall.com/lists/oss-security/2021/01/28/3
Mailing List http://www.openwall.com/lists/oss-security/2021/02/01/1
Mailing List https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b9...
Third Party Advisory https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html
Mailing List https://www.openwall.com/lists/oss-security/2021/01/28/3
25
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low