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Critical

NFSD: Fix SECINFO_NO_NAME decode error cleanup

Type: advisorySource: Official CVE List1 source record

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().

Announced Group revision 1
Original source ↗

CVE-2026-53398

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-53398

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5e76b25d7cc82c148d391c0c43b884e6427cb302",
        "lessThan": "8836405abdc53ca3dd5fc68b2cf6f8f012fad011",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "07b68ff5c71cf4ed5443016d8eb116863c0a4d88",
        "lessThan": "49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3fdc546462348b8a497c72bc894e0cde9f10fc40",
        "lessThan": "5ec37edcb534f3fc92304be236d37f08e6545585",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3fdc546462348b8a497c72bc894e0cde9f10fc40",
        "lessThan": "1e04be34cafae119e82bcaccd6d28a20f72a3647",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3fdc546462348b8a497c72bc894e0cde9f10fc40",
        "lessThan": "161d1aaeb04d620d3692639700512bb5038c1e10",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3fdc546462348b8a497c72bc894e0cde9f10fc40",
        "lessThan": "c8a24effd96d4779e2ad779654682304491c55a5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3fdc546462348b8a497c72bc894e0cde9f10fc40",
        "lessThan": "46eb17d45be69d28c7a23ea03283b207426a8232",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3fdc546462348b8a497c72bc894e0cde9f10fc40",
        "lessThan": "9e18e83b8846a5c3fe13fc8a464b4865d33996c6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5.10.220",
        "lessThan": "5.10.260",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.15.154",
        "lessThan": "5.15.211",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "fs/nfsd/nfs4xdr.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.1"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.1",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.260",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.211",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.177",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.144",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.95",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.38",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.3",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/nfsd/nfs4xdr.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-53398

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#40823 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-53398 · Revision 1Source updated