---
id: CVE-2026-53398
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  NFSD: Fix SECINFO_NO_NAME decode error cleanup

  nfsd4_decode_secinfo_no_name() currently initializes sin_exp after
  decoding sin_style
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  NFSD: Fix SECINFO_NO_NAME decode error cleanup

  nfsd4_decode_secinfo_no_name() currently initializes sin_exp after
  decoding sin_style. If the XDR stream is truncated, t…
severity: none
published: '2026-07-19'
updated: '2026-07-19'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53398'
references:
  - url: 'https://git.kernel.org/stable/c/161d1aaeb04d620d3692639700512bb5038c1e10'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/1e04be34cafae119e82bcaccd6d28a20f72a3647'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/46eb17d45be69d28c7a23ea03283b207426a8232'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5ec37edcb534f3fc92304be236d37f08e6545585'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8836405abdc53ca3dd5fc68b2cf6f8f012fad011'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9e18e83b8846a5c3fe13fc8a464b4865d33996c6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c8a24effd96d4779e2ad779654682304491c55a5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
ingestedAt: '2026-07-19T22:33:55.349Z'
epss: 0.00543
epssPercentile: 0.43131
---

## Overview

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

NFSD: Fix SECINFO_NO_NAME decode error cleanup

nfsd4_decode_secinfo_no_name() currently initializes sin_exp after
decoding sin_style. If the XDR stream is truncated, the decoder returns
nfserr_bad_xdr before sin_exp is initialized.

Since commit 3fdc54646234 ("NFSD: Reduce amount of struct
nfsd4_compoundargs that needs clearing"), the inline iops array is not
cleared between RPC calls. A failed SECINFO_NO_NAME decode can therefore
leave sin_exp holding stale union contents from a previous operation.

The error response path still invokes nfsd4_secinfo_no_name_release(),
which calls exp_put() on a non-NULL sin_exp.

Initialize sin_exp before the first failable decode step, matching
nfsd4_decode_secinfo().

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.