CVE-2021-47248

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Source

https://nvd.nist.gov/vuln/detail/CVE-2021-47248

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47248.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2021-47248

Related

Published

2024-05-21T15:15:13Z

Modified

2024-09-18T01:00:22Z

Summary

[none]

Details

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

udp: fix race between close() and udp_abort()

Kaustubh reported and diagnosed a panic in udpliblookup(). The root cause is udpabort() racing with close(). Both racing functions acquire the socket lock, but udp{v6}destroy_sock() release it before performing destructive actions.

We can't easily extend the socket lock scope to avoid the race, instead use the SOCKDEAD flag to prevent udpabort from doing any action when the critical race happens.

Diagnosed-and-tested-by: Kaustubh Pandey kapandey@codeaurora.org

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"
}