CVE-2021-47668

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-47668
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47668.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-47668
Related
Published
2025-04-17T18:15:43Z
Modified
2025-04-21T18:41:27Z
Downstream
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

can: dev: can_restart: fix use after free bug

After calling netifrxni(skb), dereferencing skb is unsafe. Especially, the canframe cf which aliases skb memory is accessed after the netifrxni() in: stats->rxbytes += cf->len;

Reordering the lines solves the issue.

References

Affected packages

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.12-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.12-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.12-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}