CVE-2021-3348 is a use-after-free vulnerability in the nbd_add_socket function within the Linux kernel's Network Block Device (NBD) driver, affecting versions up to 5.10.12, including Debian distributions. This flaw allows local attackers with NBD device access to trigger the vulnerability during device setup via a crafted I/O request. Rated with a CVSS score of 7.0 (High), successful exploitation could lead to high impact on confidentiality, integrity, and availability due to its low attack complexity and required low privileges. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 5.10.12CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.4 InfoSec Media, 0.1 Vendor Blog, and 0.0 Security Researcher mentions.
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.
Feb 9, 2021kernel: Use-after-free in ndb_queue_rq() in drivers/block/nbd.c
Jan 28, 2021