CVE-2021-47013

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-47013
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47013.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-47013
Related
Published
2024-02-28T09:15:38Z
Modified
2024-09-18T01:00:20Z
Summary
[none]
Details

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

net:emac/emac-mac: Fix a use after free in emacmactxbufsend

In emacmactxbufsend, it calls emactxfilltpd(..,skb,..). If some error happens in emactxfilltpd(), the skb will be freed via devkfreeskb(skb) in error branch of emactxfilltpd(). But the freed skb is still used via skb->len by netdevsent_queue(,skb->len).

As i observed that emactxfill_tpd() haven't modified the value of skb->len, thus my patch assigns skb->len to 'len' before the possible free and use 'len' instead of skb->len later.

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
5.10.38-1

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
5.10.38-1

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
5.10.38-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}