CVE-2021-47520

HIGH

Linux Kernel 2.6.37-4.4.295 - Use-After-Free in CAN pch_can_rx_normal

Title source: llm
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: can: pch_can: pch_can_rx_normal: fix use after free After calling netif_receive_skb(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is dereferenced just after the call netif_receive_skb(skb). Reordering the lines solves the issue.

References (8)

Core 8

Scores

CVSS v3 7.8
EPSS 0.0024
EPSS Percentile 15.4%
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 partial

Details

CWE
CWE-416
Status published
Products (19)
Linux/Linux < 2.6.37
Linux/Linux 2.6.37
Linux/Linux 4.14.258 - 4.14.*
Linux/Linux 4.19.221 - 4.19.*
Linux/Linux 4.4.295 - 4.4.*
Linux/Linux 4.9.293 - 4.9.*
Linux/Linux 5.10.85 - 5.10.*
Linux/Linux 5.15.8 - 5.15.*
Linux/Linux 5.16
Linux/Linux 5.4.165 - 5.4.*
... and 9 more
Published May 24, 2024
Tracked Since Feb 18, 2026