CVE-2026-64046

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Source
https://cve.org/CVERecord?id=CVE-2026-64046
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64046.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-64046
Downstream
BELL (1)
DEBIAN (1)
OESA (1)
SUSE (2)
UBUNTU (1)
Related
SUSE (2)
Published
2026-07-19T15:39:31Z
Modified
2026-10-17T10:11:58Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
net: tls: prevent chain-after-chain in plain text SG
Details

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

net: tls: prevent chain-after-chain in plain text SG

Sashiko points out that if end = 0 (start != 0) the current code will create a chain link to content type right after the wrap link:

This would create a chain where the wrap link points directly to another chain link. The scatterlist API sg_next iterator does not recursively resolve consecutive chain links.

meaning this is illegal input to crypto.

The wrapping link is unnecessary if end = 0. end is the entry after the last one used so end = 0 means there's nothing pushed after the wrap:

end start i v v v [ ]...[ ][ d ][ d ][ d ][ d ][rsv for wrap]

Skip the wrapping in this case.

TLS 1.3 can use the "wrapping slot" for it's chaining if end = 0. This avoids the chain-after-chain.

Move the wrap chaining before marking END and chaining off content type, that feels like more logical ordering to me, but should not matter from functional perspective.

Database specific 
{
    "cna_assigner":  "Linux",
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64046.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
9aaaa56845a06aeabdd597cbe19492dc01f281ec
Fixed
49a5faaa471ddcd37b6893970c9916eb836e7c31
Fixed
91359966e247c0244c66d50bbb8e74aefa4321c3
Fixed
410351158dfef2d67fea6603680b3a6013c6ed9d
Fixed
acdc12b71c9aa4be5dcd2c8062753c6d2033e235
Fixed
929b1548e63ac72e104c07d8ee8cbbeeba2fa89a
Fixed
af855f4c966afafef74faf8390c7b86568c0d46d
Fixed
b9c015ef1a7bf1e8dc67f21c6381f36deb2c3a36
Fixed
ff26a0e8377dec07e4a7230db7675bed1b9a6d03
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
5.4.14
Fixed
5.5
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
d529d6c9f7e3aaeac13c4948f79799ccb825f29d

Affected versions

v5.*
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
v5.4.110
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
v5.4.120
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
v5.4.130
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
v5.4.20
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
v5.4.230
v5.4.231
v5.4.232
v5.4.233
v5.4.234
v5.4.235
v5.4.236
v5.4.237
v5.4.238
v5.4.239
v5.4.24
v5.4.240
v5.4.241
v5.4.242
v5.4.243
v5.4.244
v5.4.245
v5.4.246
v5.4.247
v5.4.248
v5.4.249
v5.4.25
v5.4.250
v5.4.251
v5.4.252
v5.4.253
v5.4.254
v5.4.255
v5.4.256
v5.4.257
v5.4.258
v5.4.259
v5.4.26
v5.4.260
v5.4.261
v5.4.262
v5.4.263
v5.4.264
v5.4.265
v5.4.266
v5.4.267
v5.4.268
v5.4.269
v5.4.27
v5.4.270
v5.4.271
v5.4.272
v5.4.273
v5.4.274
v5.4.275
v5.4.276
v5.4.277
v5.4.278
v5.4.279
v5.4.28
v5.4.280
v5.4.281
v5.4.282
v5.4.283
v5.4.284
v5.4.285
v5.4.286
v5.4.287
v5.4.288
v5.4.289
v5.4.29
v5.4.290
v5.4.291
v5.4.292
v5.4.293
v5.4.294
v5.4.295
v5.4.296
v5.4.297
v5.4.298
v5.4.299
v5.4.30
v5.4.300
v5.4.301
v5.4.302
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
v5.4.40
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
v5.4.50
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
v5.4.60
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
v5.4.70
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
v5.4.80
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
v5.4.90
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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64046.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.10.258
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.209
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.175
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.142
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.92
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.34
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.0.11

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64046.json"