CVE-2022-48869
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-48869
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48869.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-48869
- Downstream
- Related
- Published
- 2024-08-21T06:09:59Z
- Modified
- 2025-10-08T07:09:38.920042Z
- Summary
- USB: gadgetfs: Fix race between mounting and unmounting
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
USB: gadgetfs: Fix race between mounting and unmounting
The syzbot fuzzer and Gerald Lee have identified a use-after-free bug in the gadgetfs driver, involving processes concurrently mounting and unmounting the gadgetfs filesystem. In particular, gadgetfsfillsuper() can race with gadgetfskillsb(), causing the latter to deallocate the_device while the former is using it. The output from KASAN says, in part:
BUG: KASAN: use-after-free in instrumentatomicreadwrite include/linux/instrumented.h:102 [inline] BUG: KASAN: use-after-free in atomicfetchsubrelease include/linux/atomic/atomic-instrumented.h:176 [inline] BUG: KASAN: use-after-free in _refcountsubandtest include/linux/refcount.h:272 [inline] BUG: KASAN: use-after-free in _refcountdecandtest include/linux/refcount.h:315 [inline] BUG: KASAN: use-after-free in refcountdecandtest include/linux/refcount.h:333 [inline] BUG: KASAN: use-after-free in putdev drivers/usb/gadget/legacy/inode.c:159 [inline] BUG: KASAN: use-after-free in gadgetfskillsb+0x33/0x100 drivers/usb/gadget/legacy/inode.c:2086 Write of size 4 at addr ffff8880276d7840 by task syz-executor126/18689
CPU: 0 PID: 18689 Comm: syz-executor126 Not tainted 6.1.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: <TASK> ... atomicfetchsubrelease include/linux/atomic/atomic-instrumented.h:176 [inline] _refcountsubandtest include/linux/refcount.h:272 [inline] _refcountdecandtest include/linux/refcount.h:315 [inline] refcountdecandtest include/linux/refcount.h:333 [inline] putdev drivers/usb/gadget/legacy/inode.c:159 [inline] gadgetfskillsb+0x33/0x100 drivers/usb/gadget/legacy/inode.c:2086 deactivatelockedsuper+0xa7/0xf0 fs/super.c:332 vfsgetsuper fs/super.c:1190 [inline] gettreesingle+0xd0/0x160 fs/super.c:1207 vfsgettree+0x88/0x270 fs/super.c:1531 vfsfsconfig_locked fs/fsopen.c:232 [inline]
The simplest solution is to ensure that gadgetfsfillsuper() and gadgetfskillsb() are serialized by making them both acquire a new mutex.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/616fd34d017000ecf9097368b13d8a266f4920b3
- https://git.kernel.org/stable/c/856e4b5e53f21edbd15d275dde62228dd94fb2b4
- https://git.kernel.org/stable/c/9a39f4626b361ee7aa10fd990401c37ec3b466ae
- https://git.kernel.org/stable/c/a2e075f40122d8daf587db126c562a67abd69cf9
- https://git.kernel.org/stable/c/d18dcfe9860e842f394e37ba01ca9440ab2178f4
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
-
Introducede5d82a7360d124ae1a38c2a5eac92ba49b125191Fixed9a39f4626b361ee7aa10fd990401c37ec3b466ae
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducede5d82a7360d124ae1a38c2a5eac92ba49b125191Fixed856e4b5e53f21edbd15d275dde62228dd94fb2b4
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducede5d82a7360d124ae1a38c2a5eac92ba49b125191Fixeda2e075f40122d8daf587db126c562a67abd69cf9
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducede5d82a7360d124ae1a38c2a5eac92ba49b125191Fixed616fd34d017000ecf9097368b13d8a266f4920b3
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducede5d82a7360d124ae1a38c2a5eac92ba49b125191Fixedd18dcfe9860e842f394e37ba01ca9440ab2178f4
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
v5.10.101
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
v5.10.17
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
v5.15.86
v5.15.87
v5.15.88
v5.15.89
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-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
v5.4.1
v5.4.10
v5.4.100
v5.4.101
v5.4.102
v5.4.103
v5.4.104
v5.4.105
v5.4.106
v5.4.107
v5.4.108
v5.4.109
v5.4.11
v5.4.110
v5.4.111
v5.4.112
v5.4.113
v5.4.114
v5.4.115
v5.4.116
v5.4.117
v5.4.118
v5.4.119
v5.4.12
v5.4.120
v5.4.121
v5.4.122
v5.4.123
v5.4.124
v5.4.125
v5.4.126
v5.4.127
v5.4.128
v5.4.129
v5.4.13
v5.4.130
v5.4.131
v5.4.132
v5.4.133
v5.4.134
v5.4.135
v5.4.136
v5.4.137
v5.4.138
v5.4.139
v5.4.14
v5.4.140
v5.4.141
v5.4.142
v5.4.143
v5.4.144
v5.4.145
v5.4.146
v5.4.147
v5.4.148
v5.4.149
v5.4.15
v5.4.150
v5.4.151
v5.4.152
v5.4.153
v5.4.154
v5.4.155
v5.4.156
v5.4.157
v5.4.158
v5.4.159
v5.4.16
v5.4.160
v5.4.161
v5.4.162
v5.4.163
v5.4.164
v5.4.165
v5.4.166
v5.4.167
v5.4.168
v5.4.169
v5.4.17
v5.4.170
v5.4.171
v5.4.172
v5.4.173
v5.4.174
v5.4.175
v5.4.176
v5.4.177
v5.4.178
v5.4.179
v5.4.18
v5.4.180
v5.4.181
v5.4.182
v5.4.183
v5.4.184
v5.4.185
v5.4.186
v5.4.187
v5.4.188
v5.4.189
v5.4.19
v5.4.190
v5.4.191
v5.4.192
v5.4.193
v5.4.194
v5.4.195
v5.4.196
v5.4.197
v5.4.198
v5.4.199
v5.4.2
v5.4.20
v5.4.200
v5.4.201
v5.4.202
v5.4.203
v5.4.204
v5.4.205
v5.4.206
v5.4.207
v5.4.208
v5.4.209
v5.4.21
v5.4.210
v5.4.211
v5.4.212
v5.4.213
v5.4.214
v5.4.215
v5.4.216
v5.4.217
v5.4.218
v5.4.219
v5.4.22
v5.4.220
v5.4.221
v5.4.222
v5.4.223
v5.4.224
v5.4.225
v5.4.226
v5.4.227
v5.4.228
v5.4.229
v5.4.23
v5.4.24
v5.4.25
v5.4.26
v5.4.27
v5.4.28
v5.4.29
v5.4.3
v5.4.30
v5.4.31
v5.4.32
v5.4.33
v5.4.34
v5.4.35
v5.4.36
v5.4.37
v5.4.38
v5.4.39
v5.4.4
v5.4.40
v5.4.41
v5.4.42
v5.4.43
v5.4.44
v5.4.45
v5.4.46
v5.4.47
v5.4.48
v5.4.49
v5.4.5
v5.4.50
v5.4.51
v5.4.52
v5.4.53
v5.4.54
v5.4.55
v5.4.56
v5.4.57
v5.4.58
v5.4.59
v5.4.6
v5.4.60
v5.4.61
v5.4.62
v5.4.63
v5.4.64
v5.4.65
v5.4.66
v5.4.67
v5.4.68
v5.4.69
v5.4.7
v5.4.70
v5.4.71
v5.4.72
v5.4.73
v5.4.74
v5.4.75
v5.4.76
v5.4.77
v5.4.78
v5.4.79
v5.4.8
v5.4.80
v5.4.81
v5.4.82
v5.4.83
v5.4.84
v5.4.85
v5.4.86
v5.4.87
v5.4.88
v5.4.89
v5.4.9
v5.4.90
v5.4.91
v5.4.92
v5.4.93
v5.4.94
v5.4.95
v5.4.96
v5.4.97
v5.4.98
v5.4.99
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
v6.1.2
v6.1.3
v6.1.4
v6.1.5
v6.1.6
v6.1.7
v6.2-rc1
v6.2-rc2
v6.2-rc3
Database specific
{
"vanir_signatures": [
{
"signature_type": "Line",
"deprecated": false,
"signature_version": "v1",
"digest": {
"line_hashes": [
"319016622104717691240260762194714114768",
"145624367918057090888772898972911312677",
"42934299262577301497999002545631070766",
"311115516235869746598768783470185964864",
"62612838390161606628331423567325199913",
"106965614529793010733827116665208757908",
"248067040553938649662272195105991666672",
"124641317613074232081616494598772661870",
"109029593993900050315827146410361922848",
"115979938823365661981246917447210444120",
"263409701060727488878928848301676756800",
"127167902680938130089704987417323900843",
"35798107804289334869739489558767613870",
"300296138122451860665871854437912071047",
"273066587740121716224663919080742237942",
"313172731749546116233024783996271105555",
"263302601883714181530250903569338344262",
"166959206480619761475872146936996578300",
"177184916518962144902503128175611773280",
"182667270227829844050451682868124439085",
"123915289714757191724724415088604288326",
"243996035942590182725284243301620455892",
"336141026098492228863727976457026285334",
"255882022987547831046651319060942129896",
"254151612712819672968962828773991001421",
"258336296653745149651613791145659090899",
"174323512481366994223866627140747169845",
"320430907198054302821861319764766285229",
"242606187861288711406510596516110986823"
],
"threshold": 0.9
},
"id": "CVE-2022-48869-15ff0b2e",
"target": {
"file": "drivers/usb/gadget/legacy/inode.c"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@856e4b5e53f21edbd15d275dde62228dd94fb2b4"
},
{
"signature_type": "Function",
"deprecated": false,
"signature_version": "v1",
"digest": {
"length": 872.0,
"function_hash": "129916587359030506176131706548309507989"
},
"id": "CVE-2022-48869-1e0e67fa",
"target": {
"file": "drivers/usb/gadget/legacy/inode.c",
"function": "gadgetfs_fill_super"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@d18dcfe9860e842f394e37ba01ca9440ab2178f4"
},
{
"signature_type": "Function",
"deprecated": false,
"signature_version": "v1",
"digest": {
"length": 872.0,
"function_hash": "129916587359030506176131706548309507989"
},
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