CVE-2021-47670
Linux Kernel Can: Use After Free Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: can: peak_usb: fix use after free bugs After calling peak_usb_netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the peak_usb_netif_rx_ni(). Reordering the lines solves the issue.
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-2021-47670.
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).
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The following list is the news that have been mention
CVE-2021-47670 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47670 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) 4.20 up to (excluding) 5.4.93 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.11 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.0 up to (excluding) 4.19.171 Added Reference Type kernel.org: https://git.kernel.org/stable/c/50aca891d7a554db0901b245167cd653d73aaa71 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5408824636fa0dfedb9ecb0d94abd573131bfbbe Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ddd1416f44130377798c1430b76503513b7497c2 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ec939c13c3fff2114479769c8380b7f1a54feca9 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: peak_usb: fix use after free bugs After calling peak_usb_netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the peak_usb_netif_rx_ni(). Reordering the lines solves the issue. Added Reference https://git.kernel.org/stable/c/50aca891d7a554db0901b245167cd653d73aaa71 Added Reference https://git.kernel.org/stable/c/5408824636fa0dfedb9ecb0d94abd573131bfbbe Added Reference https://git.kernel.org/stable/c/ddd1416f44130377798c1430b76503513b7497c2 Added Reference https://git.kernel.org/stable/c/ec939c13c3fff2114479769c8380b7f1a54feca9
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47670 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-2021-47670
weaknesses.