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().

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

Single

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* 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
2025-04-23 EPSS Updated
2025-05-04 CVE 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