CVE-2022-50369

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-50369
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50369.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-50369
Downstream
Related
Published
2025-09-17T14:56:24Z
Modified
2025-10-21T13:14:52.295107Z
Summary
drm/vkms: Fix null-ptr-deref in vkms_release()
Details

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

drm/vkms: Fix null-ptr-deref in vkms_release()

A null-ptr-deref is triggered when it tries to destroy the workqueue in vkms->output.composerworkq in vkmsrelease().

KASAN: null-ptr-deref in range [0x0000000000000118-0x000000000000011f] CPU: 5 PID: 17193 Comm: modprobe Not tainted 6.0.0-11331-gd465bff130bf #24 RIP: 0010:destroyworkqueue+0x2f/0x710 ... Call Trace: <TASK> ? vkmsconfigdebugfsinit+0x50/0x50 [vkms] _devmdrmdevalloc+0x15a/0x1c0 [drm] vkmsinit+0x245/0x1000 [vkms] dooneinitcall+0xd0/0x4f0 doinitmodule+0x1a4/0x680 loadmodule+0x6249/0x7110 _dosysfinitmodule+0x140/0x200 dosyscall64+0x35/0x80 entrySYSCALL64afterhwframe+0x46/0xb0

The reason is that an OOM happened which triggers the destroy of the workqueue, however, the workqueue is alloced in the later process, thus a null-ptr-deref happened. A simple call graph is shown as below:

vkmsinit() vkmscreate() devmdrmdevalloc() _devmdrmdevalloc() devmdrmdevinit() devmaddactionorreset() devmaddaction() # an error happened devmdrmdevinitrelease() drmdevput() krefput() drmdevrelease() vkmsrelease() destroyworkqueue() # null-ptr-deref happened vkmsmodesetinit() vkmsoutputinit() vkmscrtc_init() # where the workqueue get allocated

Fix this by checking if composerworkq is NULL before passing it to the destroyworkqueue() in vkms_release().

References

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
Introduced
6c234fe37c57627a5baf96f552afa1fae2b67d4d
Fixed
0b8f390e2251191f1b179cc87f65d54c96565f0d
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6c234fe37c57627a5baf96f552afa1fae2b67d4d
Fixed
1f9836f95271e7acf016667eee0aeae3386f9645
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6c234fe37c57627a5baf96f552afa1fae2b67d4d
Fixed
596f1ba3987e601e31a5abf1f75ce1d2635aceac
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6c234fe37c57627a5baf96f552afa1fae2b67d4d
Fixed
57031c474c3a920ea73afeb5dc352e537f5793ee
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6c234fe37c57627a5baf96f552afa1fae2b67d4d
Fixed
2fe2a8f40c21161ffe7653cc234e7934db5b7cc5

Affected versions

v4.*

v4.18
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

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
v5.10.163
v5.10.164
v5.10.165
v5.10.166
v5.10.167
v5.10.168
v5.10.169
v5.10.17
v5.10.170
v5.10.171
v5.10.172
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
v5.15.86
v5.15.87
v5.15.88
v5.15.89
v5.15.9
v5.15.90
v5.15.91
v5.15.92
v5.15.93
v5.15.94
v5.15.95
v5.15.96
v5.15.97
v5.15.98
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
v6.1
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
v6.1.10
v6.1.11
v6.1.12
v6.1.13
v6.1.14
v6.1.15
v6.1.2
v6.1.3
v6.1.4
v6.1.5
v6.1.6
v6.1.7
v6.1.8
v6.1.9
v6.2
v6.2-rc1
v6.2-rc2
v6.2-rc3
v6.2-rc4
v6.2-rc5
v6.2-rc6
v6.2-rc7
v6.2-rc8
v6.2.1
v6.2.2

Database specific

vanir_signatures

[
    {
        "id": "CVE-2022-50369-0989814c",
        "target": {
            "file": "drivers/gpu/drm/vkms/vkms_drv.c"
        },
        "digest": {
            "line_hashes": [
                "308671899827393097501305012981097196493",
                "86148628865228316957877266291238159704",
                "190402051590562577368617261703680987998",
                "186460538012830658981819078967856963317"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@57031c474c3a920ea73afeb5dc352e537f5793ee"
    },
    {
        "id": "CVE-2022-50369-4769ece4",
        "target": {
            "function": "vkms_release",
            "file": "drivers/gpu/drm/vkms/vkms_drv.c"
        },
        "digest": {
            "length": 124.0,
            "function_hash": "15317348287372289658154853938444365711"
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Function",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@596f1ba3987e601e31a5abf1f75ce1d2635aceac"
    },
    {
        "id": "CVE-2022-50369-57064f55",
        "target": {
            "function": "vkms_release",
            "file": "drivers/gpu/drm/vkms/vkms_drv.c"
        },
        "digest": {
            "length": 124.0,
            "function_hash": "15317348287372289658154853938444365711"
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Function",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@57031c474c3a920ea73afeb5dc352e537f5793ee"
    },
    {
        "id": "CVE-2022-50369-7e05377a",
        "target": {
            "file": "drivers/gpu/drm/vkms/vkms_drv.c"
        },
        "digest": {
            "line_hashes": [
                "308671899827393097501305012981097196493",
                "86148628865228316957877266291238159704",
                "190402051590562577368617261703680987998",
                "186460538012830658981819078967856963317"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@596f1ba3987e601e31a5abf1f75ce1d2635aceac"
    },
    {
        "id": "CVE-2022-50369-8e108a2e",
        "target": {
            "file": "drivers/gpu/drm/vkms/vkms_drv.c"
        },
        "digest": {
            "line_hashes": [
                "308671899827393097501305012981097196493",
                "86148628865228316957877266291238159704",
                "190402051590562577368617261703680987998",
                "186460538012830658981819078967856963317"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@1f9836f95271e7acf016667eee0aeae3386f9645"
    },
    {
        "id": "CVE-2022-50369-90ccc5c9",
        "target": {
            "file": "drivers/gpu/drm/vkms/vkms_drv.c"
        },
        "digest": {
            "line_hashes": [
                "229957304793879985392174689371112365303",
                "295913194711489123787225856996710435539",
                "330409260936988406184317934576316587057",
                "186460538012830658981819078967856963317"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@0b8f390e2251191f1b179cc87f65d54c96565f0d"
    },
    {
        "id": "CVE-2022-50369-b00e39cb",
        "target": {
            "function": "vkms_release",
            "file": "drivers/gpu/drm/vkms/vkms_drv.c"
        },
        "digest": {
            "length": 170.0,
            "function_hash": "245321808402552058277033586639519380515"
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Function",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@0b8f390e2251191f1b179cc87f65d54c96565f0d"
    },
    {
        "id": "CVE-2022-50369-e4f56e7b",
        "target": {
            "function": "vkms_release",
            "file": "drivers/gpu/drm/vkms/vkms_drv.c"
        },
        "digest": {
            "length": 124.0,
            "function_hash": "15317348287372289658154853938444365711"
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Function",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@2fe2a8f40c21161ffe7653cc234e7934db5b7cc5"
    },
    {
        "id": "CVE-2022-50369-e52a838e",
        "target": {
            "file": "drivers/gpu/drm/vkms/vkms_drv.c"
        },
        "digest": {
            "line_hashes": [
                "308671899827393097501305012981097196493",
                "86148628865228316957877266291238159704",
                "190402051590562577368617261703680987998",
                "186460538012830658981819078967856963317"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@2fe2a8f40c21161ffe7653cc234e7934db5b7cc5"
    },
    {
        "id": "CVE-2022-50369-f7d0aa42",
        "target": {
            "function": "vkms_release",
            "file": "drivers/gpu/drm/vkms/vkms_drv.c"
        },
        "digest": {
            "length": 124.0,
            "function_hash": "15317348287372289658154853938444365711"
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Function",
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@1f9836f95271e7acf016667eee0aeae3386f9645"
    }
]

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
4.20.0
Fixed
5.10.173
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.99
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.16
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.2.3