CVE-2021-47669

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47669
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().

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/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105 Patch
https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb Patch
https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052 Patch
https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70 Patch
https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69 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:*:*:*:*:*:*:*:*
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
References () https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105 - () https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105 - Patch
References () https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb - () https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb - Patch
References () https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052 - () https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052 - Patch
References () https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70 - () https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70 - Patch
References () https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69 - () https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69 - Patch
First Time Linux linux Kernel
Linux
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: vxcan: vxcan_xmit: corrección del error "use after free". Tras llamar a netif_rx_ni(skb), desreferenciar skb no es seguro. En particular, se accede al cfd canfd_frame, que crea un alias de memoria skb, después de netif_rx_ni().

17 Apr 2025, 19:15

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

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-2021-47669

Mitre link : CVE-2021-47669

CVE.ORG link : CVE-2021-47669

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-416

Use After Free