CVE-2021-47670

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: 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.

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 7

VendorProductVersionRange
linuxlinux_kernel*≥4.0  –  <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 4

  • git.kernel.org https://git.kernel.org/stable/c/50aca891d7a554db0901b245167cd653d73aaa71
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5408824636fa0dfedb9ecb0d94abd573131bfbbe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ddd1416f44130377798c1430b76503513b7497c2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ec939c13c3fff2114479769c8380b7f1a54feca9
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/50aca891d7a554db0901b245167cd653d73aaa71
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5408824636fa0dfedb9ecb0d94abd573131bfbbe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ddd1416f44130377798c1430b76503513b7497c2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ec939c13c3fff2114479769c8380b7f1a54feca9
    Patch