CVE-2021-47669

HIGH EPSS 5.4%
Published Apr 17, 20251y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Apr 17, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

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().

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
5.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥4.12  –  <4.14.218
linuxlinux_kernel*≥4.15  –  <4.19.171
linuxlinux_kernel*≥4.20  –  <5.4.93
linuxlinux_kernel*≥5.5  –  <5.10.11
linuxlinux_kernel5.11any
linuxlinux_kernel5.11any
linuxlinux_kernel5.11any
linuxlinux_kernel5.11any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69
    Patch