CVE-2021-47520

HighCVSS 7.8/10Last modified Aug 4, 2026

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

VendorProductVersions
LinuxLinux>= b21d18b51b31a24d17f883b678432fbdee3d5675, < bafe343a885c70dddf358379cf0b2a1c07355d8d; >= b21d18b51b31a24d17f883b678432fbdee3d5675, < 3a3c46e2eff0577454860a203be1a8295f4acb76; >= b21d18b51b31a24d17f883b678432fbdee3d5675, < affbad02bf80380a7403885b9fe4a1587d1bb4f3; >= b21d18b51b31a24d17f883b678432fbdee3d5675, < 3e193ef4e0a3f5bf92ede83ef214cb09d01b00aa; >= b21d18b51b31a24d17f883b678432fbdee3d5675, < abb4eff3dcd2e583060082a18a8dbf31f02689d4; >= b21d18b51b31a24d17f883b678432fbdee3d5675, < 703dde112021c93d6e89443c070e7dbd4dea612e; >= b21d18b51b31a24d17f883b678432fbdee3d5675, < 6c73fc931658d8cbc8a1714b326cb31eb71d16a7; >= b21d18b51b31a24d17f883b678432fbdee3d5675, < 94cddf1e9227a171b27292509d59691819c458db
LinuxLinux2.6.37

References

Timeline

Published
May 24, 2024
Last modified
Aug 4, 2026
NVD status
Modified

Related CVEs from 2021

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CVE-2021-47520: High severity, CVSS 7.8 | Vulnix