CVE-2021-47670

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47670
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.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/50aca891d7a554db0901b245167cd653d73aaa71 Patch
https://git.kernel.org/stable/c/5408824636fa0dfedb9ecb0d94abd573131bfbbe Patch
https://git.kernel.org/stable/c/ddd1416f44130377798c1430b76503513b7497c2 Patch
https://git.kernel.org/stable/c/ec939c13c3fff2114479769c8380b7f1a54feca9 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.11:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.11:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.11:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.11:rc4:*:*:*:*:*:*
History

21 Apr 2025, 18:41

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:5.11:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.11:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.11:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.11:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: peak_usb: corrección de errores de use after free. Tras llamar a peak_usb_netif_rx_ni(skb), desreferenciar skb no es seguro. En particular, se accede al cf can_frame, que crea un alias de memoria skb, después de peak_usb_netif_rx_ni(). Reordenar las líneas soluciona el problema.
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/50aca891d7a554db0901b245167cd653d73aaa71 - () https://git.kernel.org/stable/c/50aca891d7a554db0901b245167cd653d73aaa71 - Patch
References () https://git.kernel.org/stable/c/5408824636fa0dfedb9ecb0d94abd573131bfbbe - () https://git.kernel.org/stable/c/5408824636fa0dfedb9ecb0d94abd573131bfbbe - Patch
References () https://git.kernel.org/stable/c/ddd1416f44130377798c1430b76503513b7497c2 - () https://git.kernel.org/stable/c/ddd1416f44130377798c1430b76503513b7497c2 - Patch
References () https://git.kernel.org/stable/c/ec939c13c3fff2114479769c8380b7f1a54feca9 - () https://git.kernel.org/stable/c/ec939c13c3fff2114479769c8380b7f1a54feca9 - Patch

17 Apr 2025, 19:15

Type Values Removed Values Added
CWE CWE-416
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8

17 Apr 2025, 18:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-04-17 18:15

Updated : 2025-04-21 18:41

NVD link : CVE-2021-47670

Mitre link : CVE-2021-47670

CVE.ORG link : CVE-2021-47670

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-416

Use After Free