CVE-2021-47552 is a NULL pointer dereference vulnerability in the Linux kernel's block layer (blk-mq) affecting versions prior to the fix. This flaw occurs during queue cleanup or disk release when dispatch work is not properly canceled, leading to a kernel oops. The vulnerability has a CVSS v3.1 score of 5.5 (Medium), indicating a local attack vector with low attack complexity. A successful exploit could lead to a denial of service (system crash) but does not impact confidentiality or integrity. There is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. The vulnerability has received minimal community discussion and media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 5.15.6CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
5.16CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.