CVE-2025-23142

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Source
https://cve.org/CVERecord?id=CVE-2025-23142
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-23142.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-23142
Downstream
BELL (1)
CLSA (4)
DEBIAN (1)
ECHO (1)
MINI (1)
OESA (5)
RHSA (6)
ROOT (3)
SUSE (11)
UBUNTU (1)
Related
SUSE (11)
Published
2025-05-01T12:55:32Z
Modified
2026-10-20T10:31:05Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
sctp: detect and prevent references to a freed transport in sendmsg
Details

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

sctp: detect and prevent references to a freed transport in sendmsg

sctp_sendmsg() re-uses associations and transports when possible by doing a lookup based on the socket endpoint and the message destination address, and then sctp_sendmsg_to_asoc() sets the selected transport in all the message chunks to be sent.

There's a possible race condition if another thread triggers the removal of that selected transport, for instance, by explicitly unbinding an address with setsockopt(SCTP_SOCKOPT_BINDX_REM), after the chunks have been set up and before the message is sent. This can happen if the send buffer is full, during the period when the sender thread temporarily releases the socket lock in sctp_wait_for_sndbuf().

This causes the access to the transport data in sctp_outq_select_transport(), when the association outqueue is flushed, to result in a use-after-free read.

This change avoids this scenario by having sctp_transport_free() signal the freeing of the transport, tagging it as "dead". In order to do this, the patch restores the "dead" bit in struct sctp_transport, which was removed in commit 47faa1e4c50e ("sctp: remove the dead field of sctp_transport").

Then, in the scenario where the sender thread has released the socket lock in sctp_wait_for_sndbuf(), the bit is checked again after re-acquiring the socket lock to detect the deletion. This is done while holding a reference to the transport to prevent it from being freed in the process.

If the transport was deleted while the socket lock was relinquished, sctp_sendmsg_to_asoc() will return -EAGAIN to let userspace retry the send.

The bug was found by a private syzbot instance (see the error report [1] and the C reproducer that triggers it [2]).

Database specific 
{
    "cna_assigner":  "Linux",
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/23xxx/CVE-2025-23142.json"
}
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
df132eff463873e14e019a07f387b4d577d6d1f9
Fixed
547762250220325d350d0917a7231480e0f4142b
Fixed
3257386be6a7eb8a8bfc9cbfb746df4eb4fc70e8
Fixed
0f7df4899299ce4662e5f95badb9dbc57cc37fa5
Fixed
7a63f4fb0efb4e69efd990cbb740a848679ec4b0
Fixed
c6fefcb71d246baaf3bacdad1af7ff50ebcfe652
Fixed
9e7c37fadb3be1fc33073fcf10aa96d166caa697
Fixed
5bc83bdf5f5b8010d1ca5a4555537e62413ab4e2
Fixed
2e5068b7e0ae0a54f6cfd03a2f80977da657f1ee
Fixed
f1a69a940de58b16e8249dff26f74c8cc59b32be
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
3.18.128
Fixed
3.19
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
4.4.166
Fixed
4.5
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
4.9.142
Fixed
4.10
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
4.14.85
Fixed
4.15
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
4.19.6
Fixed
4.20
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
26e51e5287eed4d96ea66a3da95429f42940f013
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
8b97e045bd6d37f96f161e4d371ae174148e1587
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
e044554e97e812eb257d073bcc130e0ea653858f
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
8376fdc999be008f0e9918db52f1ed8c08f5a1c9
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
cd947138e8c31e8cfcd489c12e9b97271beb6e79

Affected versions

v3.*
v3.18.128
v3.18.129
v3.18.130
v3.18.131
v3.18.132
v3.18.133
v3.18.134
v3.18.135
v3.18.136
v3.18.137
v3.18.138
v3.18.139
v3.18.140
v4.*
v4.14.100
v4.14.101
v4.14.102
v4.14.103
v4.14.104
v4.14.105
v4.14.106
v4.14.107
v4.14.108
v4.14.109
v4.14.110
v4.14.111
v4.14.112
v4.14.113
v4.14.114
v4.14.115
v4.14.116
v4.14.117
v4.14.118
v4.14.119
v4.14.120
v4.14.121
v4.14.122
v4.14.123
v4.14.124
v4.14.125
v4.14.126
v4.14.127
v4.14.128
v4.14.129
v4.14.130
v4.14.131
v4.14.132
v4.14.133
v4.14.134
v4.14.135
v4.14.136
v4.14.137
v4.14.138
v4.14.139
v4.14.140
v4.14.141
v4.14.142
v4.14.143
v4.14.144
v4.14.145
v4.14.146
v4.14.147
v4.14.148
v4.14.149
v4.14.150
v4.14.151
v4.14.152
v4.14.153
v4.14.154
v4.14.155
v4.14.156
v4.14.157
v4.14.158
v4.14.159
v4.14.160
v4.14.161
v4.14.162
v4.14.163
v4.14.164
v4.14.165
v4.14.166
v4.14.167
v4.14.168
v4.14.169
v4.14.170
v4.14.171
v4.14.172
v4.14.173
v4.14.174
v4.14.175
v4.14.176
v4.14.177
v4.14.178
v4.14.179
v4.14.180
v4.14.181
v4.14.182
v4.14.183
v4.14.184
v4.14.185
v4.14.186
v4.14.187
v4.14.188
v4.14.189
v4.14.190
v4.14.191
v4.14.192
v4.14.193
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v4.14.196
v4.14.197
v4.14.198
v4.14.199
v4.14.200
v4.14.201
v4.14.202
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v4.14.256
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v4.14.263
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v4.14.266
v4.14.267
v4.14.268
v4.14.269
v4.14.270
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v4.14.273
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v4.14.281
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v4.14.297
v4.14.298
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v4.14.327
v4.14.328
v4.14.329
v4.14.330
v4.14.331
v4.14.332
v4.14.333
v4.14.334
v4.14.335
v4.14.336
v4.14.85
v4.14.86
v4.14.87
v4.14.88
v4.14.89
v4.14.90
v4.14.91
v4.14.92
v4.14.93
v4.14.94
v4.14.95
v4.14.96
v4.14.97
v4.14.98
v4.14.99
v4.19.10
v4.19.100
v4.19.101
v4.19.102
v4.19.103
v4.19.104
v4.19.105
v4.19.106
v4.19.107
v4.19.108
v4.19.109
v4.19.11
v4.19.110
v4.19.111
v4.19.112
v4.19.113
v4.19.114
v4.19.115
v4.19.116
v4.19.117
v4.19.118
v4.19.119
v4.19.12
v4.19.120
v4.19.121
v4.19.122
v4.19.123
v4.19.124
v4.19.125
v4.19.126
v4.19.127
v4.19.128
v4.19.129
v4.19.13
v4.19.130
v4.19.131
v4.19.132
v4.19.133
v4.19.134
v4.19.135
v4.19.136
v4.19.137
v4.19.138
v4.19.139
v4.19.14
v4.19.140
v4.19.141
v4.19.142
v4.19.143
v4.19.144
v4.19.145
v4.19.146
v4.19.147
v4.19.148
v4.19.149
v4.19.15
v4.19.150
v4.19.151
v4.19.152
v4.19.153
v4.19.154
v4.19.155
v4.19.156
v4.19.157
v4.19.158
v4.19.159
v4.19.16
v4.19.160
v4.19.161
v4.19.162
v4.19.163
v4.19.164
v4.19.165
v4.19.166
v4.19.167
v4.19.168
v4.19.169
v4.19.17
v4.19.170
v4.19.171
v4.19.172
v4.19.173
v4.19.174
v4.19.175
v4.19.176
v4.19.177
v4.19.178
v4.19.179
v4.19.18
v4.19.180
v4.19.181
v4.19.182
v4.19.183
v4.19.184
v4.19.185
v4.19.186
v4.19.187
v4.19.188
v4.19.189
v4.19.19
v4.19.190
v4.19.191
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v4.19.194
v4.19.195
v4.19.196
v4.19.197
v4.19.198
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v4.19.20
v4.19.200
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v4.19.203
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v4.19.205
v4.19.206
v4.19.207
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v4.19.209
v4.19.21
v4.19.210
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v4.19.266
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v4.19.268
v4.19.269
v4.19.27
v4.19.270
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v4.19.279
v4.19.28
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v4.19.29
v4.19.290
v4.19.291
v4.19.292
v4.19.293
v4.19.294
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v4.19.296
v4.19.297
v4.19.298
v4.19.299
v4.19.30
v4.19.300
v4.19.301
v4.19.302
v4.19.303
v4.19.304
v4.19.305
v4.19.306
v4.19.307
v4.19.308
v4.19.309
v4.19.31
v4.19.310
v4.19.311
v4.19.312
v4.19.313
v4.19.314
v4.19.315
v4.19.316
v4.19.317
v4.19.318
v4.19.319
v4.19.32
v4.19.320
v4.19.321
v4.19.322
v4.19.323
v4.19.324
v4.19.325
v4.19.33
v4.19.34
v4.19.35
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v4.19.55
v4.19.56
v4.19.57
v4.19.58
v4.19.59
v4.19.6
v4.19.60
v4.19.61
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v4.19.63
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v4.19.66
v4.19.67
v4.19.68
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v4.19.7
v4.19.70
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v4.19.73
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v4.19.75
v4.19.76
v4.19.77
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v4.19.8
v4.19.80
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v4.19.84
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v4.19.86
v4.19.87
v4.19.88
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v4.19.9
v4.19.90
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v4.19.93
v4.19.94
v4.19.95
v4.19.96
v4.19.97
v4.19.98
v4.19.99
v4.4.166
v4.4.167
v4.4.168
v4.4.169
v4.4.170
v4.4.171
v4.4.172
v4.4.173
v4.4.174
v4.4.175
v4.4.176
v4.4.177
v4.4.178
v4.4.179
v4.4.180
v4.4.181
v4.4.182
v4.4.183
v4.4.184
v4.4.185
v4.4.186
v4.4.187
v4.4.188
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v4.4.190
v4.4.191
v4.4.192
v4.4.193
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v4.4.233
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v4.9.142
v4.9.143
v4.9.144
v4.9.145
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v4.9.148
v4.9.149
v4.9.150
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v4.9.152
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v4.9.154
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v4.9.159
v4.9.160
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v4.9.163
v4.9.164
v4.9.165
v4.9.166
v4.9.167
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v4.9.169
v4.9.170
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v4.9.174
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v4.9.203
v4.9.204
v4.9.205
v4.9.206
v4.9.207
v4.9.208
v4.9.209
v4.9.210
v4.9.211
v4.9.212
v4.9.213
v4.9.214
v4.9.215
v4.9.216
v4.9.217
v4.9.218
v4.9.219
v4.9.220
v4.9.221
v4.9.222
v4.9.223
v4.9.224
v4.9.225
v4.9.226
v4.9.227
v4.9.228
v4.9.229
v4.9.230
v4.9.231
v4.9.232
v4.9.233
v4.9.234
v4.9.235
v4.9.236
v4.9.237
v4.9.238
v4.9.239
v4.9.240
v4.9.241
v4.9.242
v4.9.243
v4.9.244
v4.9.245
v4.9.246
v4.9.247
v4.9.248
v4.9.249
v4.9.250
v4.9.251
v4.9.252
v4.9.253
v4.9.254
v4.9.255
v4.9.256
v4.9.257
v4.9.258
v4.9.259
v4.9.260
v4.9.261
v4.9.262
v4.9.263
v4.9.264
v4.9.265
v4.9.266
v4.9.267
v4.9.268
v4.9.269
v4.9.270
v4.9.271
v4.9.272
v4.9.273
v4.9.274
v4.9.275
v4.9.276
v4.9.277
v4.9.278
v4.9.279
v4.9.280
v4.9.281
v4.9.282
v4.9.283
v4.9.284
v4.9.285
v4.9.286
v4.9.287
v4.9.288
v4.9.289
v4.9.290
v4.9.291
v4.9.292
v4.9.293
v4.9.294
v4.9.295
v4.9.296
v4.9.297
v4.9.298
v4.9.299
v4.9.300
v4.9.301
v4.9.302
v4.9.303
v4.9.304
v4.9.305
v4.9.306
v4.9.307
v4.9.308
v4.9.309
v4.9.310
v4.9.311
v4.9.312
v4.9.313
v4.9.314
v4.9.315
v4.9.316
v4.9.317
v4.9.318
v4.9.319
v4.9.320
v4.9.321
v4.9.322
v4.9.323
v4.9.324
v4.9.325
v4.9.326
v4.9.327
v4.9.328
v4.9.329
v4.9.330
v4.9.331
v4.9.332
v4.9.333
v4.9.334
v4.9.335
v4.9.336
v4.9.337

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-23142.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
4.20.0
Fixed
5.4.293
Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.237
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.181
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.135
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.88
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.24
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.13.12
Type
ECOSYSTEM
Events
Introduced
6.14.0
Fixed
6.14.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-23142.json"