CVE-2026-53266
- Source
- https://cve.org/CVERecord?id=CVE-2026-53266
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53266.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-53266
- Downstream
AZL (1)
BELL (1)
CGA (32)
- CGA-28rx-vrxv-3rq8
- CGA-49cq-w5fx-452q
- CGA-4r85-jr53-8c6j
- CGA-4w6m-w755-59cg
- CGA-5393-cxr9-7hh7
- CGA-6mrw-c4v7-q2m3
- CGA-6mw6-hc47-5hx7
- CGA-6xw8-wj4g-7gjf
- CGA-7qqx-j9vr-5rj3
- CGA-7rhq-9828-2f8h
- CGA-7w5c-949c-f4qf
- CGA-8w3p-w59v-hvp6
- CGA-97cr-3c7r-247r
- CGA-98f3-r47x-gx7m
- CGA-9rv7-pwg6-vqqq
- CGA-cj9r-639q-rc3r
- CGA-f52q-c5vr-xh9m
- CGA-g9x9-m28h-8c6p
- CGA-hvjj-7p9v-qh8x
- CGA-j7j9-pmf5-q67x
- CGA-jg25-3h5w-52jc
- CGA-jrgp-vphm-3cgv
- CGA-q69h-jg69-x56w
- CGA-q9j7-8g7j-qp4m
- CGA-qjv7-2qh5-8f44
- CGA-qpf3-7jvp-r4cm
- CGA-qqr8-q25q-9jch
- CGA-qv78-wqx4-542g
- CGA-vqjc-4frr-x4qc
- CGA-w2pg-vhx8-mp37
- CGA-w4v5-5q2p-w773
- CGA-w869-3pgp-jv24
DEBIAN (1)
ECHO (1)
MGASA (1)
openSUSE (1)
RHSA (16)
ROOT (4)
SUSE (15)
- Related
- Published
- 2026-06-25T08:39:53Z
- Modified
- 2026-10-20T10:31:02Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
- Summary
- netfilter: bridge: make ebt_snat ARP rewrite writable
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
netfilter: bridge: make ebt_snat ARP rewrite writable
The ebtables SNAT target keeps the Ethernet source address rewrite behind skb_ensure_writable(skb, 0). This is intentional: at the bridge ebtables hooks the Ethernet header is addressed through skb_mac_header()/eth_hdr(), while skb->data points at the Ethernet payload. Asking skb_ensure_writable() for ETH_HLEN bytes would check the payload, not the Ethernet header, and would reintroduce the small packet regression fixed by commit 63137bc5882a.
However, the optional ARP sender hardware address rewrite is different. It writes through skb_store_bits() at an offset relative to skb->data:
skb_store_bits(skb, sizeof(struct arphdr), info->mac, ETH_ALEN)skb_header_pointer() only safely reads the ARP header; it does not make the later sender hardware address range writable. If that range is still held in a nonlinear skb fragment backed by a splice-imported file page, skb_store_bits() maps the frag page and copies the new MAC address directly into it.
Ensure the ARP SHA range is writable before reading the ARP header and before calling skb_store_bits().
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53266.json" }- References
-
- https://git.kernel.org/stable/c/153ea96c806aea395daba907a4f88480b6ad5093
- https://git.kernel.org/stable/c/67ba971ae02514d85818fe0c32549ab4bfa3bf49
- https://git.kernel.org/stable/c/76280b78cc9f23bdc6438e10ad6dff148ef8375b
- https://git.kernel.org/stable/c/afd64b59c3de9bbbdd3759e834fdc55cda716e0b
- https://git.kernel.org/stable/c/b18675263db1147c8e1cab625400c13a0d87bd2d
- https://git.kernel.org/stable/c/b7e91939ba9be805a62a257fa4e227dffbb88fa0
- https://git.kernel.org/stable/c/bf84ad7c7a9ede46e31afaa41a1ba06a159e8c87
- https://git.kernel.org/stable/c/c9b5ff59feffb92a147a84a5aa28acd2cb8ff4c5
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-53266
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53266.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-53266
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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
-
Introduced63137bc5882a1882c553d389fdeeeace86ee1741Fixedbf84ad7c7a9ede46e31afaa41a1ba06a159e8c87Fixed76280b78cc9f23bdc6438e10ad6dff148ef8375bFixedb7e91939ba9be805a62a257fa4e227dffbb88fa0Fixedafd64b59c3de9bbbdd3759e834fdc55cda716e0bFixed153ea96c806aea395daba907a4f88480b6ad5093Fixedb18675263db1147c8e1cab625400c13a0d87bd2dFixedc9b5ff59feffb92a147a84a5aa28acd2cb8ff4c5Fixed67ba971ae02514d85818fe0c32549ab4bfa3bf49
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.4.73Fixed5.5
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.8.17Fixed5.9
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced5.9.2Fixed5.10
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced2f3839075a5f8dcf116c1abe35b36b018ac62445
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced51ba2945a8ef65ae437c8f9ba05f0343aa82ae5b
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedb7d23c2c87584eb429f115c078ed511be8b18e29
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
v5.4.140
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
v5.4.150
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
v5.4.160
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
v5.4.170
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
v5.4.180
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
v5.4.190
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
v5.4.200
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
v5.4.210
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
v5.4.220
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
v5.4.230
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
v5.4.240
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
v5.4.250
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
v5.4.260
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
v5.4.270
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
v5.4.280
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
v5.4.290
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
v5.4.300
v5.4.301
v5.4.302
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
v5.8.17
v5.8.18
v5.9.10
v5.9.11
v5.9.12
v5.9.13
v5.9.14
v5.9.15
v5.9.16
v5.9.2
v5.9.3
v5.9.4
v5.9.5
v5.9.6
v5.9.7
v5.9.8
v5.9.9
Linux / Kernel
Package
- Name
- Kernel
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced5.10.0Fixed5.10.259
- Type
- ECOSYSTEM
- Events
-
Introduced5.11.0Fixed5.15.210
- Type
- ECOSYSTEM
- Events
-
Introduced5.16.0Fixed6.1.176
- Type
- ECOSYSTEM
- Events
-
Introduced6.2.0Fixed6.6.143
- Type
- ECOSYSTEM
- Events
-
Introduced6.7.0Fixed6.12.94
- Type
- ECOSYSTEM
- Events
-
Introduced6.13.0Fixed6.18.36
- Type
- ECOSYSTEM
- Events
-
Introduced6.19.0Fixed7.0.13