CVE-2021-47232
Linux Kernel - CAN j1939 Use-after-Free
Description
In the Linux kernel, the following vulnerability has been resolved: can: j1939: fix Use-after-Free, hold skb ref while in use This patch fixes a Use-after-Free found by the syzbot. The problem is that a skb is taken from the per-session skb queue, without incrementing the ref count. This leads to a Use-after-Free if the skb is taken concurrently from the session queue due to a CTS.
INFO
Published Date :
May 21, 2024, 3:15 p.m.
Last Modified :
April 4, 2025, 2:31 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
2.5
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-2021-47232.
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-2021-47232 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47232 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.
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Initial Analysis by [email protected]
Apr. 04, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.4 up to (excluding) 5.4.128 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.46 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.12.13 Added Reference Type CVE: https://git.kernel.org/stable/c/1071065eeb33d32b7d98c2ce7591881ae7381705 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/1071065eeb33d32b7d98c2ce7591881ae7381705 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/2030043e616cab40f510299f09b636285e0a3678 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2030043e616cab40f510299f09b636285e0a3678 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/22cba878abf646cd3a02ee7c8c2cef7afe66a256 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/22cba878abf646cd3a02ee7c8c2cef7afe66a256 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/509ab6bfdd0c76daebbad0f0af07da712116de22 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/509ab6bfdd0c76daebbad0f0af07da712116de22 Types: Patch -
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/1071065eeb33d32b7d98c2ce7591881ae7381705 Added Reference https://git.kernel.org/stable/c/2030043e616cab40f510299f09b636285e0a3678 Added Reference https://git.kernel.org/stable/c/22cba878abf646cd3a02ee7c8c2cef7afe66a256 Added Reference https://git.kernel.org/stable/c/509ab6bfdd0c76daebbad0f0af07da712116de22 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 03, 2024
Action Type Old Value New Value Added CWE CISA-ADP CWE-416 Added CVSS V3.1 CISA-ADP AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 21, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: can: j1939: fix Use-after-Free, hold skb ref while in use This patch fixes a Use-after-Free found by the syzbot. The problem is that a skb is taken from the per-session skb queue, without incrementing the ref count. This leads to a Use-after-Free if the skb is taken concurrently from the session queue due to a CTS. Added Reference kernel.org https://git.kernel.org/stable/c/22cba878abf646cd3a02ee7c8c2cef7afe66a256 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/509ab6bfdd0c76daebbad0f0af07da712116de22 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/1071065eeb33d32b7d98c2ce7591881ae7381705 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/2030043e616cab40f510299f09b636285e0a3678 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47232 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-2021-47232
weaknesses.