CVE-2021-47670

can: peak_usb: fix use after free bugs

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track*

*SSVC

Descriptions

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.

*Credits: N/A

CVSS Scores

CISAv3.1 7.8

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track*

Exploitation

None

Automatable

Tech. Impact

Total

* Organization's Worst-case Scenario

Timeline

2025-04-16 CVE Reserved
2025-04-17 CVE Published
2025-04-17 CVE Updated
---------- EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-416: Use After Free

CAPEC

References (5)

URL	Tag	Source
https://git.kernel.org/stable/c/0a25e1f4f18566b750ebd3ae995af64e23111e63	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/5408824636fa0dfedb9ecb0d94abd573131bfbbe	2021-01-27
https://git.kernel.org/stable/c/ddd1416f44130377798c1430b76503513b7497c2	2021-01-27
https://git.kernel.org/stable/c/ec939c13c3fff2114479769c8380b7f1a54feca9	2021-01-27
https://git.kernel.org/stable/c/50aca891d7a554db0901b245167cd653d73aaa71	2021-01-20

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.0 < 4.19.171 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.0 < 4.19.171"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.0 < 5.4.93 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.0 < 5.4.93"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.0 < 5.10.11 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.0 < 5.10.11"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.0 < 5.11 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.0 < 5.11"		en		Affected