CVE-2022-50453
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-50453
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-50453.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-50453
- Downstream
- Related
- Published
- 2025-10-01T11:45:26Z
- Modified
- 2025-10-15T12:09:01.742447Z
- Summary
- gpiolib: cdev: fix NULL-pointer dereferences
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
gpiolib: cdev: fix NULL-pointer dereferences
There are several places where we can crash the kernel by requesting lines, unbinding the GPIO device, then calling any of the system calls relevant to the GPIO character device's annonymous file descriptors: ioctl(), read(), poll().
While I observed it with the GPIO simulator, it will also happen for any of the GPIO devices that can be hot-unplugged - for instance any HID GPIO expander (e.g. CP2112).
This affects both v1 and v2 uAPI.
This fixes it partially by checking if gdev->chip is not NULL but it doesn't entirely remedy the situation as we still have a race condition in which another thread can remove the device after the check.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/533aae7c94dbc2b14301cfd68ae7e0e90f0c8438
- https://git.kernel.org/stable/c/6d79546622baab843172b52c3af035f83c1b21df
- https://git.kernel.org/stable/c/7c755a2d6df511eeb5afba966ac28140f9ea5063
- https://git.kernel.org/stable/c/ac6ce3cd7a3e10a2e37b8970bab81b4d33d5cfc3
- https://git.kernel.org/stable/c/d66f68ac9e7ba46b6b90fbe25155723f2126088a
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
-
Introducedd7c51b47ac11e66f547b55640405c1c474642d72Fixed6d79546622baab843172b52c3af035f83c1b21df
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd7c51b47ac11e66f547b55640405c1c474642d72Fixed7c755a2d6df511eeb5afba966ac28140f9ea5063
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd7c51b47ac11e66f547b55640405c1c474642d72Fixedd66f68ac9e7ba46b6b90fbe25155723f2126088a
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd7c51b47ac11e66f547b55640405c1c474642d72Fixedac6ce3cd7a3e10a2e37b8970bab81b4d33d5cfc3
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd7c51b47ac11e66f547b55640405c1c474642d72Fixed533aae7c94dbc2b14301cfd68ae7e0e90f0c8438
Affected versions
v4.*
v4.10
v4.10-rc1
v4.10-rc2
v4.10-rc3
v4.10-rc4
v4.10-rc5
v4.10-rc6
v4.10-rc7
v4.10-rc8
v4.11
v4.11-rc1
v4.11-rc2
v4.11-rc3
v4.11-rc4
v4.11-rc5
v4.11-rc6
v4.11-rc7
v4.11-rc8
v4.12
v4.12-rc1
v4.12-rc2
v4.12-rc3
v4.12-rc4
v4.12-rc5
v4.12-rc6
v4.12-rc7
v4.13
v4.13-rc1
v4.13-rc2
v4.13-rc3
v4.13-rc4
v4.13-rc5
v4.13-rc6
v4.13-rc7
v4.14
v4.14-rc1
v4.14-rc2
v4.14-rc3
v4.14-rc4
v4.14-rc5
v4.14-rc6
v4.14-rc7
v4.14-rc8
v4.15
v4.15-rc1
v4.15-rc2
v4.15-rc3
v4.15-rc4
v4.15-rc5
v4.15-rc6
v4.15-rc7
v4.15-rc8
v4.15-rc9
v4.16
v4.16-rc1
v4.16-rc2
v4.16-rc3
v4.16-rc4
v4.16-rc5
v4.16-rc6
v4.16-rc7
v4.17
v4.17-rc1
v4.17-rc2
v4.17-rc3
v4.17-rc4
v4.17-rc5
v4.17-rc6
v4.17-rc7
v4.18
v4.18-rc1
v4.18-rc2
v4.18-rc3
v4.18-rc4
v4.18-rc5
v4.18-rc6
v4.18-rc7
v4.18-rc8
v4.19
v4.19-rc1
v4.19-rc2
v4.19-rc3
v4.19-rc4
v4.19-rc5
v4.19-rc6
v4.19-rc7
v4.19-rc8
v4.20
v4.20-rc1
v4.20-rc2
v4.20-rc3
v4.20-rc4
v4.20-rc5
v4.20-rc6
v4.20-rc7
v4.7
v4.7-rc3
v4.7-rc4
v4.7-rc5
v4.7-rc6
v4.7-rc7
v4.8
v4.8-rc1
v4.8-rc2
v4.8-rc3
v4.8-rc4
v4.8-rc5
v4.8-rc6
v4.8-rc7
v4.8-rc8
v4.9
v4.9-rc1
v4.9-rc2
v4.9-rc3
v4.9-rc4
v4.9-rc5
v4.9-rc6
v4.9-rc7
v4.9-rc8
v5.*
v5.0
v5.0-rc1
v5.0-rc2
v5.0-rc3
v5.0-rc4
v5.0-rc5
v5.0-rc6
v5.0-rc7
v5.0-rc8
v5.1
v5.1-rc1
v5.1-rc2
v5.1-rc3
v5.1-rc4
v5.1-rc5
v5.1-rc6
v5.1-rc7
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
v5.10.101
v5.10.102
v5.10.103
v5.10.104
v5.10.105
v5.10.106
v5.10.107
v5.10.108
v5.10.109
v5.10.11
v5.10.110
v5.10.111
v5.10.112
v5.10.113
v5.10.114
v5.10.115
v5.10.116
v5.10.117
v5.10.118
v5.10.119
v5.10.12
v5.10.120
v5.10.121
v5.10.122
v5.10.123
v5.10.124
v5.10.125
v5.10.126
v5.10.127
v5.10.128
v5.10.129
v5.10.13
v5.10.130
v5.10.131
v5.10.132
v5.10.133
v5.10.134
v5.10.135
v5.10.136
v5.10.137
v5.10.138
v5.10.139
v5.10.14
v5.10.140
v5.10.141
v5.10.142
v5.10.143
v5.10.144
v5.10.145
v5.10.146
v5.10.147
v5.10.148
v5.10.149
v5.10.15
v5.10.150
v5.10.151
v5.10.152
v5.10.153
v5.10.154
v5.10.155
v5.10.156
v5.10.157
v5.10.158
v5.10.159
v5.10.16
v5.10.160
v5.10.161
v5.10.162
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
v5.15.24
v5.15.25
v5.15.26
v5.15.27
v5.15.28
v5.15.29
v5.15.3
v5.15.30
v5.15.31
v5.15.32
v5.15.33
v5.15.34
v5.15.35
v5.15.36
v5.15.37
v5.15.38
v5.15.39
v5.15.4
v5.15.40
v5.15.41
v5.15.42
v5.15.43
v5.15.44
v5.15.45
v5.15.46
v5.15.47
v5.15.48
v5.15.49
v5.15.5
v5.15.50
v5.15.51
v5.15.52
v5.15.53
v5.15.54
v5.15.55
v5.15.56
v5.15.57
v5.15.58
v5.15.59
v5.15.6
v5.15.60
v5.15.61
v5.15.62
v5.15.63
v5.15.64
v5.15.65
v5.15.66
v5.15.67
v5.15.68
v5.15.69
v5.15.7
v5.15.70
v5.15.71
v5.15.72
v5.15.73
v5.15.74
v5.15.75
v5.15.76
v5.15.77
v5.15.78
v5.15.79
v5.15.8
v5.15.80
v5.15.81
v5.15.82
v5.15.83
v5.15.84
v5.15.85
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
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.19
v5.19-rc1
v5.19-rc2
v5.19-rc3
v5.19-rc4
v5.19-rc5
v5.19-rc6
v5.19-rc7
v5.19-rc8
v5.2
v5.2-rc1
v5.2-rc2
v5.2-rc3
v5.2-rc4
v5.2-rc5
v5.2-rc6
v5.2-rc7
v5.3
v5.3-rc1
v5.3-rc2
v5.3-rc3
v5.3-rc4
v5.3-rc5
v5.3-rc6
v5.3-rc7
v5.3-rc8
v5.4
v5.4-rc1
v5.4-rc2
v5.4-rc3
v5.4-rc4
v5.4-rc5
v5.4-rc6
v5.4-rc7
v5.4-rc8
v5.5
v5.5-rc1
v5.5-rc2
v5.5-rc3
v5.5-rc4
v5.5-rc5
v5.5-rc6
v5.5-rc7
v5.6
v5.6-rc1
v5.6-rc2
v5.6-rc3
v5.6-rc4
v5.6-rc5
v5.6-rc6
v5.6-rc7
v5.7
v5.7-rc1
v5.7-rc2
v5.7-rc3
v5.7-rc4
v5.7-rc5
v5.7-rc6
v5.7-rc7
v5.8
v5.8-rc1
v5.8-rc2
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
v6.*
v6.0
v6.0-rc1
v6.0-rc2
v6.0-rc3
v6.0-rc4
v6.0-rc5
v6.0-rc6
v6.0-rc7
v6.0.1
v6.0.10
v6.0.11
v6.0.12
v6.0.13
v6.0.14
v6.0.15
v6.0.2
v6.0.3
v6.0.4
v6.0.5
v6.0.6
v6.0.7
v6.0.8
v6.0.9
v6.1
v6.1-rc1
v6.1-rc2
v6.1-rc3
v6.1-rc4
v6.1-rc5
v6.1-rc6
v6.1-rc7
v6.1-rc8
v6.1.1
Database specific
vanir_signatures
[
{
"signature_type": "Function",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@d66f68ac9e7ba46b6b90fbe25155723f2126088a",
"signature_version": "v1",
"target": {
"function": "lineinfo_watch_poll",
"file": "drivers/gpio/gpiolib-cdev.c"
},
"digest": {
"function_hash": "147457501358183186178397573872345452678",
"length": 259.0
},
"id": "CVE-2022-50453-0603b1d0"
},
{
"signature_type": "Function",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@6d79546622baab843172b52c3af035f83c1b21df",
"signature_version": "v1",
"target": {
"function": "lineevent_ioctl",
"file": "drivers/gpio/gpiolib-cdev.c"
},
"digest": {
"function_hash": "146576241798685070164490290556278031328",
"length": 464.0
},
"id": "CVE-2022-50453-0a5e7e54"
},
{
"signature_type": "Function",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@7c755a2d6df511eeb5afba966ac28140f9ea5063",
"signature_version": "v1",
"target": {
"function": "lineinfo_watch_poll",
"file": "drivers/gpio/gpiolib-cdev.c"
},
"digest": {
"function_hash": "147457501358183186178397573872345452678",
"length": 259.0
},
"id": "CVE-2022-50453-146289dd"
},
{
"signature_type": "Line",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@ac6ce3cd7a3e10a2e37b8970bab81b4d33d5cfc3",
"signature_version": "v1",
"target": {
"file": "drivers/gpio/gpiolib-cdev.c"
},
"digest": {
"threshold": 0.9,
"line_hashes": [
"320367085911270056484146162598005975470",
"250239249995904469496035531389480038894",
"299662663487725967104193259019079644994",
"315857857145349898305679192687864009567",
"42358110574100444997093676067531571420",
"161659443780514421877911594277993963068",
"223691120205641954364306179020186035264",
"183564354212010790735659890948780943422",
"281351107632552582013026432650340492780",
"203903197526000209638370550342172879871",
"229973726950817995084046180522796066348",
"288498882056912211433324590306284115562",
"287713758297705504957305472840098535655",
"56391432370020480313830291253060378481",
"239210503843820140904488367650581366287",
"220996102701573375604615733931743046374",
"288395960422332566369147214340570325533",
"260145331931415960438526400126229320052",
"221556684082573202635016938532425767952",
"182330859235201011295971724906186415827",
"7648286824149179827168159557566620922",
"81651459824484082978747732414863191282",
"234004264039237513556129306708542227907",
"99857810082496604709133710068473676351",
"308370361756395522481709788992512816866",
"151629848557925584024877906287799181533",
"257024009151553415409146996958999375623"
]
},
"id": "CVE-2022-50453-163499f3"
},
{
"signature_type": "Function",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@ac6ce3cd7a3e10a2e37b8970bab81b4d33d5cfc3",
"signature_version": "v1",
"target": {
"function": "lineinfo_watch_read",
"file": "drivers/gpio/gpiolib-cdev.c"
},
"digest": {
"function_hash": "7604342535631577679334744319935653911",
"length": 1385.0
},
"id": "CVE-2022-50453-18b8d30b"
},
{
"signature_type": "Function",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@7c755a2d6df511eeb5afba966ac28140f9ea5063",
"signature_version": "v1",
"target": {
"function": "linereq_poll",
"file": "drivers/gpio/gpiolib-cdev.c"
},
"digest": {
"function_hash": "242239791105665841555368315956804286315",
"length": 261.0
},
"id": "CVE-2022-50453-1d934414"
},
{
"signature_type": "Function",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@ac6ce3cd7a3e10a2e37b8970bab81b4d33d5cfc3",
"signature_version": "v1",
"target": {
"function": "linereq_read",
"file": "drivers/gpio/gpiolib-cdev.c"
},
"digest": {
"function_hash": "295117641203085621007768777493450990901",
"length": 868.0
},
"id": "CVE-2022-50453-1da01210"
},
{
"signature_type": "Function",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@7c755a2d6df511eeb5afba966ac28140f9ea5063",
"signature_version": "v1",
"target": {
"function": "linereq_read",
"file": "drivers/gpio/gpiolib-cdev.c"
},
"digest": {
"function_hash": "295117641203085621007768777493450990901",
"length": 868.0
},
"id": "CVE-2022-50453-23011098"
},
{
"signature_type": "Function",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@d66f68ac9e7ba46b6b90fbe25155723f2126088a",
"signature_version": "v1",
"target": {
"function": "lineevent_read",
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