CVE-2021-47186
"Tipc Linux Kernel Null Pointer Dereference Vulnerability"
Description
In the Linux kernel, the following vulnerability has been resolved: tipc: check for null after calling kmemdup kmemdup can return a null pointer so need to check for it, otherwise the null key will be dereferenced later in tipc_crypto_key_xmit as can be seen in the trace [1]. [1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58
INFO
Published Date :
April 10, 2024, 7:15 p.m.
Last Modified :
Feb. 21, 2025, 5:15 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Linux kernel.
- Update the affected packages.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47186.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47186 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47186
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47186 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47186 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 04, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 from (excluding) 5.15.5 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 from (excluding) 5.10.82 Added Reference Type CVE: https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9 Types: Patch -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Feb. 21, 2025
Action Type Old Value New Value Removed CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Removed CWE CWE-690 -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916 Added Reference https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10 Added Reference https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 08, 2024
Action Type Old Value New Value Added CWE CISA-ADP CWE-690 Added CVSS V3.1 CISA-ADP AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Apr. 10, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: tipc: check for null after calling kmemdup kmemdup can return a null pointer so need to check for it, otherwise the null key will be dereferenced later in tipc_crypto_key_xmit as can be seen in the trace [1]. [1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58 Added Reference kernel.org https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916 [No types assigned]