CVE-2026-53398

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Source
https://cve.org/CVERecord?id=CVE-2026-53398
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53398.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-53398
Downstream
Published
2026-07-19T12:01:59.507Z
Modified
2026-07-22T05:29:48.578214558Z
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
NFSD: Fix SECINFO_NO_NAME decode error cleanup
Details

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

NFSD: Fix SECINFONONAME decode error cleanup

nfsd4decodesecinfononame() currently initializes sinexp after decoding sinstyle. If the XDR stream is truncated, the decoder returns nfserrbadxdr before sin_exp is initialized.

Since commit 3fdc54646234 ("NFSD: Reduce amount of struct nfsd4compoundargs that needs clearing"), the inline iops array is not cleared between RPC calls. A failed SECINFONONAME decode can therefore leave sinexp holding stale union contents from a previous operation.

The error response path still invokes nfsd4secinfononamerelease(), which calls expput() on a non-NULL sinexp.

Initialize sinexp before the first failable decode step, matching nfsd4decode_secinfo().

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53398.json",
    "cna_assigner": "Linux"
}
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
5e76b25d7cc82c148d391c0c43b884e6427cb302
Fixed
8836405abdc53ca3dd5fc68b2cf6f8f012fad011
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
07b68ff5c71cf4ed5443016d8eb116863c0a4d88
Fixed
49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
3fdc546462348b8a497c72bc894e0cde9f10fc40
Fixed
5ec37edcb534f3fc92304be236d37f08e6545585
Fixed
1e04be34cafae119e82bcaccd6d28a20f72a3647
Fixed
161d1aaeb04d620d3692639700512bb5038c1e10
Fixed
c8a24effd96d4779e2ad779654682304491c55a5
Fixed
46eb17d45be69d28c7a23ea03283b207426a8232
Fixed
9e18e83b8846a5c3fe13fc8a464b4865d33996c6
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
5.10.220
Fixed
5.10.260
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
5.15.154
Fixed
5.15.211

Affected versions

v5.*
v5.10.220
v5.10.221
v5.10.222
v5.10.223
v5.10.224
v5.10.225
v5.10.226
v5.10.227
v5.10.228
v5.10.229
v5.10.230
v5.10.231
v5.10.232
v5.10.233
v5.10.234
v5.10.235
v5.10.236
v5.10.237
v5.10.238
v5.10.239
v5.10.240
v5.10.241
v5.10.242
v5.10.243
v5.10.244
v5.10.245
v5.10.246
v5.10.247
v5.10.248
v5.10.249
v5.10.250
v5.10.251
v5.10.252
v5.10.253
v5.10.254
v5.10.255
v5.10.256
v5.10.257
v5.10.258
v5.10.259
v5.15.154
v5.15.155
v5.15.156
v5.15.157
v5.15.158
v5.15.159
v5.15.160
v5.15.161
v5.15.162
v5.15.163
v5.15.164
v5.15.165
v5.15.166
v5.15.167
v5.15.168
v5.15.169
v5.15.170
v5.15.171
v5.15.172
v5.15.173
v5.15.174
v5.15.175
v5.15.176
v5.15.177
v5.15.178
v5.15.179
v5.15.180
v5.15.181
v5.15.182
v5.15.183
v5.15.184
v5.15.185
v5.15.186
v5.15.187
v5.15.188
v5.15.189
v5.15.190
v5.15.191
v5.15.192
v5.15.193
v5.15.194
v5.15.195
v5.15.196
v5.15.197
v5.15.198
v5.15.199
v5.15.200
v5.15.201
v5.15.202
v5.15.203
v5.15.204
v5.15.205
v5.15.206
v5.15.207
v5.15.208
v5.15.209
v5.15.210

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53398.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.260
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.211
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.177
Type
ECOSYSTEM
Events
Introduced
6.1.0
Fixed
6.6.144
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.12.95
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.18.38
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
7.1.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53398.json"