Vulnerabilities CVE-2021-47520

CVE-2021-47520

High

Open

TLP:CLEAR

can: pch_can: pch_can_rx_normal: fix use after free

NVD CVE.org

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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.

Details

CVSS Score: 8.8
EPSS Score ⓘ: 0.34%

26.7th percentile
CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Confidence: 90%
Published: May 24, 2024
Last Modified: Aug 5, 2026

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