CVE-2021-43267 is a critical vulnerability in the Linux kernel's Transparent Inter-Process Communication (TIPC) functionality, affecting versions prior to 5.14.16, including Fedora and NetApp products. The flaw stems from insufficient validation of user-supplied sizes for MSG_CRYPTO messages, allowing remote attackers to exploit it. With a CVSS score of 9.8 (CRITICAL), it presents a high-impact threat, enabling complete compromise of confidentiality, integrity, and availability without user interaction or authentication. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media attention, indicating a high level of concern.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 5.10, < 5.10.77CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
>= 5.11, < 5.14.16CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
34CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | ||
35CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
An issue was discovered in net/tipc/crypto.c in the Linux kernel before 5.14.16. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.
Nov 9, 2021kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type
Nov 2, 2021