CVE-2021-47579

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Source

https://nvd.nist.gov/vuln/detail/CVE-2021-47579

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47579.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2021-47579

Related

Published

2024-06-19T15:15:52Z

Modified

2024-09-18T03:18:54.291992Z

Summary

[none]

Details

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

ovl: fix warning in ovlcreatereal()

Syzbot triggered the following warning in ovlworkdircreate() -> ovlcreatereal():

if (!err && WARN_ON(!newdentry->d_inode)) {

The reason is that the cgroup2 filesystem returns from mkdir without instantiating the new dentry.

Weird filesystems such as this will be rejected by overlayfs at a later stage during setup, but to prevent such a warning, call ovlmkdirreal() directly from ovlworkdircreate() and reject this case early.

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

5.10.92-1

Affected versions

5.*

5.10.46-4

5.10.46-5

5.10.70-1~bpo10+1

5.10.70-1

5.10.84-1

5.10.92-1~bpo10+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

5.15.15-1

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

5.15.15-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}