CVE-2021-47669
Linux Kernel - CAN vxcan Use After Free
Description
In the Linux kernel, the following vulnerability has been resolved: can: vxcan: vxcan_xmit: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the canfd_frame cfd which aliases skb memory is accessed after the netif_rx_ni().
INFO
Published Date :
April 17, 2025, 6:15 p.m.
Last Modified :
April 21, 2025, 6:41 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
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-2021-47669.
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-2021-47669 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47669 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. 21, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:5.11:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.11:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.11:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.11:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.171 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.93 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.12 up to (excluding) 4.14.218 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.11 Added Reference Type kernel.org: https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69 Types: Patch -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 17, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-416 -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Apr. 17, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: can: vxcan: vxcan_xmit: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the canfd_frame cfd which aliases skb memory is accessed after the netif_rx_ni(). Added Reference https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105 Added Reference https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb Added Reference https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052 Added Reference https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70 Added Reference https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47669 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-2021-47669
weaknesses.