Bug 2360786 (CVE-2021-47670)

Summary:	CVE-2021-47670 kernel: can: peak_usb: fix use after free bugs
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-04-17 19:01:43 UTC

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.

Comment 1 Avinash Hanwate 2025-04-18 03:49:52 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025041734-CVE-2021-47670-2b77@gregkh/T

Comment 4 errata-xmlrpc 2025-08-11 09:39:32 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2025:13590 https://access.redhat.com/errata/RHSA-2025:13590

Comment 5 errata-xmlrpc 2025-08-11 09:45:17 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2025:13589 https://access.redhat.com/errata/RHSA-2025:13589

Comment 6 errata-xmlrpc 2025-08-20 08:08:30 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2025:14136 https://access.redhat.com/errata/RHSA-2025:14136

Comment 7 errata-xmlrpc 2025-08-25 14:13:38 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2025:14511 https://access.redhat.com/errata/RHSA-2025:14511

Comment 8 errata-xmlrpc 2025-08-27 00:23:10 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2025:14692 https://access.redhat.com/errata/RHSA-2025:14692

Comment 9 errata-xmlrpc 2025-09-02 06:52:50 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2025:15035 https://access.redhat.com/errata/RHSA-2025:15035