CVE-2021-47669

can: vxcan: vxcan_xmit: fix use after free bug

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: 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().

*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 (6)

URL	Tag	Source
https://git.kernel.org/stable/c/a8f820a380a2a06fc4fe1a54159067958f800929	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105	2021-01-30
https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052	2021-01-27
https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70	2021-01-27
https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69	2021-01-27
https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb	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"				>= 4.12 < 4.14.218 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.12 < 4.14.218"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.12 < 4.19.171 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.12 < 4.19.171"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.12 < 5.4.93 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.12 < 5.4.93"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.12 < 5.10.11 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.12 < 5.10.11"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.12 < 5.11 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.12 < 5.11"		en		Affected