CVE-2022-48813

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-48813
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48813.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-48813
Related
Published
2024-07-16T12:15:05Z
Modified
2024-09-18T03:22:37.011239Z
Summary
[none]
Details

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

net: dsa: felix: don't use devres for mdiobus

As explained in commits: 74b6d7d13307 ("net: dsa: realtek: register the MDIO bus under devres") 5135e96a3dd2 ("net: dsa: don't allocate the slavemiibus using devres")

mdiobusfree() will panic when called from devmmdiobusfree() <- devresreleaseall() <- _devicereleasedriver(), and that mdiobus was not previously unregistered.

The Felix VSC9959 switch is a PCI device, so the initial set of constraints that I thought would cause this (I2C or SPI buses which call ->remove on ->shutdown) do not apply. But there is one more which applies here.

If the DSA master itself is on a bus that calls ->remove from ->shutdown (like dpaa2-eth, which is on the fsl-mc bus), there is a device link between the switch and the DSA master, and devicelinksunbind_consumers() will unbind the felix switch driver on shutdown.

So the same treatment must be applied to all DSA switch drivers, which is: either use devres for both the mdiobus allocation and registration, or don't use devres at all.

The felix driver has the code structure in place for orderly mdiobus removal, so just replace devmmdiobusalloc_size() with the non-devres variant, and add manual free where necessary, to ensure that we don't let devres free a still-registered bus.

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
5.10.103-1

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
5.10.92-1
5.10.92-2
5.10.103-1~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
5.16.10-1

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
5.16.10-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}