CVE-2022-48817
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-48817
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48817.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-48817
- Downstream
- Related
- Published
- 2024-07-16T11:44:05Z
- Modified
- 2025-10-21T08:30:25.271127Z
- Summary
- net: dsa: ar9331: register the mdiobus under devres
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net: dsa: ar9331: register the mdiobus under devres
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 ar9331 is an MDIO 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 ar9331 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 ar9331 driver doesn't have a complex code structure for mdiobus removal, so just replace ofmdiobusregister with the devres variant in order to be all-devres and ensure that we don't free a still-registered bus.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/475ce5dcf2d88fd4f3c213a0ac944e3e40702970
- https://git.kernel.org/stable/c/50facd86e9fbc4b93fe02e5fe05776047f45dbfb
- https://git.kernel.org/stable/c/aae1c6a1d3d696fc33b609fb12fe744a556d1dc5
- https://git.kernel.org/stable/c/f1842a8cb71de4d7eb75a86f76e88c7ee739218c
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedac3a68d56651c3dad2c12c7afce065fe15267f44Fixed475ce5dcf2d88fd4f3c213a0ac944e3e40702970
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedac3a68d56651c3dad2c12c7afce065fe15267f44Fixedaae1c6a1d3d696fc33b609fb12fe744a556d1dc5
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedac3a68d56651c3dad2c12c7afce065fe15267f44Fixedf1842a8cb71de4d7eb75a86f76e88c7ee739218c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedac3a68d56651c3dad2c12c7afce065fe15267f44Fixed50facd86e9fbc4b93fe02e5fe05776047f45dbfb
Affected versions
v5.*
v5.10
v5.10-rc1
v5.10-rc2
v5.10-rc3
v5.10-rc4
v5.10-rc5
v5.10-rc6
v5.10-rc7
v5.10.1
v5.10.10
v5.10.100
v5.10.11
v5.10.12
v5.10.13
v5.10.14
v5.10.15
v5.10.16
v5.10.17
v5.10.18
v5.10.19
v5.10.2
v5.10.20
v5.10.21
v5.10.22
v5.10.23
v5.10.24
v5.10.25
v5.10.26
v5.10.27
v5.10.28
v5.10.29
v5.10.3
v5.10.30
v5.10.31
v5.10.32
v5.10.33
v5.10.34
v5.10.35
v5.10.36
v5.10.37
v5.10.38
v5.10.39
v5.10.4
v5.10.40
v5.10.41
v5.10.42
v5.10.43
v5.10.44
v5.10.45
v5.10.46
v5.10.47
v5.10.48
v5.10.49
v5.10.5
v5.10.50
v5.10.51
v5.10.52
v5.10.53
v5.10.54
v5.10.55
v5.10.56
v5.10.57
v5.10.58
v5.10.59
v5.10.6
v5.10.60
v5.10.61
v5.10.62
v5.10.63
v5.10.64
v5.10.65
v5.10.66
v5.10.67
v5.10.68
v5.10.69
v5.10.7
v5.10.70
v5.10.71
v5.10.72
v5.10.73
v5.10.74
v5.10.75
v5.10.76
v5.10.77
v5.10.78
v5.10.79
v5.10.8
v5.10.80
v5.10.81
v5.10.82
v5.10.83
v5.10.84
v5.10.85
v5.10.86
v5.10.87
v5.10.88
v5.10.89
v5.10.9
v5.10.90
v5.10.91
v5.10.92
v5.10.93
v5.10.94
v5.10.95
v5.10.96
v5.10.97
v5.10.98
v5.10.99
v5.11
v5.11-rc1
v5.11-rc2
v5.11-rc3
v5.11-rc4
v5.11-rc5
v5.11-rc6
v5.11-rc7
v5.12
v5.12-rc1
v5.12-rc1-dontuse
v5.12-rc2
v5.12-rc3
v5.12-rc4
v5.12-rc5
v5.12-rc6
v5.12-rc7
v5.12-rc8
v5.13
v5.13-rc1
v5.13-rc2
v5.13-rc3
v5.13-rc4
v5.13-rc5
v5.13-rc6
v5.13-rc7
v5.14
v5.14-rc1
v5.14-rc2
v5.14-rc3
v5.14-rc4
v5.14-rc5
v5.14-rc6
v5.14-rc7
v5.15
v5.15-rc1
v5.15-rc2
v5.15-rc3
v5.15-rc4
v5.15-rc5
v5.15-rc6
v5.15-rc7
v5.15.1
v5.15.10
v5.15.11
v5.15.12
v5.15.13
v5.15.14
v5.15.15
v5.15.16
v5.15.17
v5.15.18
v5.15.19
v5.15.2
v5.15.20
v5.15.21
v5.15.22
v5.15.23
v5.15.3
v5.15.4
v5.15.5
v5.15.6
v5.15.7
v5.15.8
v5.15.9
v5.16
v5.16-rc1
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.16.1
v5.16.2
v5.16.3
v5.16.4
v5.16.5
v5.16.6
v5.16.7
v5.16.8
v5.16.9
v5.17-rc1
v5.17-rc2
v5.8
v5.8-rc3
v5.8-rc4
v5.8-rc5
v5.8-rc6
v5.8-rc7
v5.9
v5.9-rc1
v5.9-rc2
v5.9-rc3
v5.9-rc4
v5.9-rc5
v5.9-rc6
v5.9-rc7
v5.9-rc8
Database specific
vanir_signatures
[
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"deprecated": false,
"id": "CVE-2022-48817-0132b746",
"target": {
"function": "ar9331_sw_remove",
"file": "drivers/net/dsa/qca/ar9331.c"
},
"digest": {
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},
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"deprecated": false,
"id": "CVE-2022-48817-06f1778b",
"target": {
"function": "ar9331_sw_mbus_init",
"file": "drivers/net/dsa/qca/ar9331.c"
},
"digest": {
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"deprecated": false,
"id": "CVE-2022-48817-20f0659b",
"target": {
"function": "ar9331_sw_mbus_init",
"file": "drivers/net/dsa/qca/ar9331.c"
},
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},
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"deprecated": false,
"id": "CVE-2022-48817-26946d1c",
"target": {
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},
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"deprecated": false,
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{
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"target": {
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"digest": {
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