CVE-2021-47259

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Source

https://nvd.nist.gov/vuln/detail/CVE-2021-47259

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47259.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2021-47259

Related

Published

2024-05-21T15:15:14Z

Modified

2024-09-18T01:00:20Z

Summary

[none]

Details

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

NFS: Fix use-after-free in nfs4initclient()

KASAN reports a use-after-free when attempting to mount two different exports through two different NICs that belong to the same server.

Olga was able to hit this with kernels starting somewhere between 5.7 and 5.10, but I traced the patch that introduced the clearbit() call to 4.13. So something must have changed in the refcounting of the clp pointer to make this call to nfsput_client() the very last one.

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

5.10.46-1

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

5.10.46-1

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

5.10.46-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}