CVE-2021-47670

HIGH

Linux Kernel < 4.19.171 - Use-After-Free in CAN peak_usb Netif RX Handler

Title source: llm
STIX 2.1

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.

References (4)

Core 4

Scores

CVSS v3 7.8
EPSS 0.0016
EPSS Percentile 5.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-416
Status published
Products (12)
Linux/Linux < 4.0
Linux/Linux 0a25e1f4f18566b750ebd3ae995af64e23111e63 - 50aca891d7a554db0901b245167cd653d73aaa71
Linux/Linux 0a25e1f4f18566b750ebd3ae995af64e23111e63 - 5408824636fa0dfedb9ecb0d94abd573131bfbbe
Linux/Linux 0a25e1f4f18566b750ebd3ae995af64e23111e63 - ddd1416f44130377798c1430b76503513b7497c2
Linux/Linux 0a25e1f4f18566b750ebd3ae995af64e23111e63 - ec939c13c3fff2114479769c8380b7f1a54feca9
Linux/Linux 4.0
Linux/Linux 4.19.171 - 4.19.*
Linux/Linux 5.10.11 - 5.10.*
Linux/Linux 5.11
Linux/Linux 5.4.93 - 5.4.*
... and 2 more
Published Apr 17, 2025
Tracked Since Feb 18, 2026