CVE-2022-48970

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-48970
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48970.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-48970
Downstream
Related
Published
2024-10-21T20:05:51Z
Modified
2025-10-08T07:36:49.670742Z
Summary
af_unix: Get user_ns from in_skb in unix_diag_get_exact().
Details

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

afunix: Get userns from inskb in unixdiaggetexact().

Wei Chen reported a NULL deref in skuserns() 0, and Paolo diagnosed the root cause: in unixdiagget_exact(), the newly allocated skb does not have sk. [2]

We must get the userns from the NETLINKCB(inskb).sk and pass it to skdiag_fill().

PF: supervisor read access in kernel mode

PF: error_code(0x0000) - not-present page

PGD 12bbce067 P4D 12bbce067 PUD 12bc40067 PMD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 27942 Comm: syz-executor.0 Not tainted 6.1.0-rc5-next-20221118 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-48-gd9c812dda519-prebuilt.qemu.org 04/01/2014 RIP: 0010:skuserns include/net/sock.h:920 [inline] RIP: 0010:skdiagdumpuid net/unix/diag.c:119 [inline] RIP: 0010:skdiagfill+0x77d/0x890 net/unix/diag.c:170 Code: 89 ef e8 66 d4 2d fd c7 44 24 40 00 00 00 00 49 8d 7c 24 18 e8 54 d7 2d fd 49 8b 5c 24 18 48 8d bb 70 02 00 00 e8 43 d7 2d fd <48> 8b 9b 70 02 00 00 48 8d 7b 10 e8 33 d7 2d fd 48 8b 5b 10 48 8d RSP: 0018:ffffc90000d67968 EFLAGS: 00010246 RAX: ffff88812badaa48 RBX: 0000000000000000 RCX: ffffffff840d481d RDX: 0000000000000465 RSI: 0000000000000000 RDI: 0000000000000270 RBP: ffffc90000d679a8 R08: 0000000000000277 R09: 0000000000000000 R10: 0001ffffffffffff R11: 0001c90000d679a8 R12: ffff88812ac03800 R13: ffff88812c87c400 R14: ffff88812ae42210 R15: ffff888103026940 FS: 00007f08b4e6f700(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000270 CR3: 000000012c58b000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> unixdiaggetexact net/unix/diag.c:285 [inline] unixdiaghandlerdump+0x3f9/0x500 net/unix/diag.c:317 sockdiagcmd net/core/sockdiag.c:235 [inline] sockdiagrcvmsg+0x237/0x250 net/core/sockdiag.c:266 netlinkrcvskb+0x13e/0x250 net/netlink/afnetlink.c:2564 sockdiagrcv+0x24/0x40 net/core/sockdiag.c:277 netlinkunicastkernel net/netlink/afnetlink.c:1330 [inline] netlinkunicast+0x5e9/0x6b0 net/netlink/afnetlink.c:1356 netlinksendmsg+0x739/0x860 net/netlink/afnetlink.c:1932 socksendmsgnosec net/socket.c:714 [inline] socksendmsg net/socket.c:734 [inline] syssendmsg+0x38f/0x500 net/socket.c:2476 _syssendmsg net/socket.c:2530 [inline] _syssendmsg+0x197/0x230 net/socket.c:2559 _dosyssendmsg net/socket.c:2568 [inline] _sesyssendmsg net/socket.c:2566 [inline] _x64syssendmsg+0x42/0x50 net/socket.c:2566 dosyscallx64 arch/x86/entry/common.c:50 [inline] dosyscall64+0x2b/0x70 arch/x86/entry/common.c:80 entrySYSCALL64afterhwframe+0x63/0xcd RIP: 0033:0x4697f9 Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f08b4e6ec48 EFLAGS: 00000246 ORIGRAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000077bf80 RCX: 00000000004697f9 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 00000000004d29e9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000077bf80 R13: 0000000000000000 R14: 000000000077bf80 R15: 00007ffdb36bc6c0 </TASK> Modules linked in: CR2: 0000000000000270

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
cae9910e73446cac68a54e3a7b02aaa12b689026
Fixed
c66d78aee55dab72c92020ebfbebc464d4f5dd2a
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
cae9910e73446cac68a54e3a7b02aaa12b689026
Fixed
575a6266f63dbb3b8eb1da03671451f0d81b8034
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
cae9910e73446cac68a54e3a7b02aaa12b689026
Fixed
5c014eb0ed6c8c57f483e94cc6e90f34ce426d91
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
cae9910e73446cac68a54e3a7b02aaa12b689026
Fixed
9c1d6f79a2c7b8221dcec27defc6dc461052ead4
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
cae9910e73446cac68a54e3a7b02aaa12b689026
Fixed
b3abe42e94900bdd045c472f9c9be620ba5ce553

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
v5.10.16
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
v5.15.24
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
v5.15.9
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
v5.4.23
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
v6.0.1
v6.0.10
v6.0.11
v6.0.12
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-rc1
v6.1-rc2
v6.1-rc3
v6.1-rc4
v6.1-rc5
v6.1-rc6
v6.1-rc7

Database specific 

{
    "vanir_signatures": [
        {
            "deprecated": false,
            "id": "CVE-2022-48970-02c3632b",
            "digest": {
                "function_hash": "69269724327631480351856894462118199969",
                "length": 967.0
            },
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@575a6266f63dbb3b8eb1da03671451f0d81b8034",
            "target": {
                "file": "net/unix/diag.c",
                "function": "unix_diag_get_exact"
            },
            "signature_type": "Function",
            "signature_version": "v1"
        },
        {
            "deprecated": false,
            "id": "CVE-2022-48970-0c8d08d5",
            "digest": {
                "function_hash": "182847064875104324690686156607800532428",
                "length": 296.0
            },
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@c66d78aee55dab72c92020ebfbebc464d4f5dd2a",
            "target": {
                "file": "net/unix/diag.c",
                "function": "sk_diag_dump"
            },
            "signature_type": "Function",
            "signature_version": "v1"
        },
        {
            "deprecated": false,
            "id": "CVE-2022-48970-1a01cd64",
            "digest": {
                "function_hash": "182847064875104324690686156607800532428",
                "length": 296.0
            },
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@575a6266f63dbb3b8eb1da03671451f0d81b8034",
            "target": {
                "file": "net/unix/diag.c",
                "function": "sk_diag_dump"
            },
            "signature_type": "Function",
            "signature_version": "v1"
        },
        {
            "deprecated": false,
            "id": "CVE-2022-48970-261121c6",
            "digest": {
                "function_hash": "182847064875104324690686156607800532428",
                "length": 296.0
            },
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b3abe42e94900bdd045c472f9c9be620ba5ce553",
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                    "54794210633663961003339059061498672761",
                    "120646412019966692848524641742374468761",
                    "334922233696186700168452162418318972769",
                    "332997337485606440655990073089916724512",
                    "226283084951746455221690756039274695281",
                    "125991703730518402507351142437571245756",
                    "208312227918585973083970810720476343506",
                    "50470140781389380889795855774941860662",
                    "35934098150091634991688540228112149653",
                    "134738684430074824879378758719428604152",
                    "148352308609769582049702768701373824666",
                    "169310088553306003560908674612039255355",
                    "302598871713986994094037621124914570460"
                ]
            },
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@575a6266f63dbb3b8eb1da03671451f0d81b8034",
            "target": {
                "file": "net/unix/diag.c"
            },
            "signature_type": "Line",
            "signature_version": "v1"
        }
    ]
}

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.3.0
Fixed
5.4.227
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.159
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.83
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.0.13