GHSA-HFVV-WWWP-6WGR

Vulnerability from github – Published: 2026-07-19 12:30 – Updated: 2026-07-20 15:31
VLAI
Details

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().

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2026-53398"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T12:16:50Z",
    "severity": "CRITICAL"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: Fix SECINFO_NO_NAME decode error cleanup\n\nnfsd4_decode_secinfo_no_name() currently initializes sin_exp after\ndecoding sin_style. If the XDR stream is truncated, the decoder returns\nnfserr_bad_xdr before sin_exp is initialized.\n\nSince commit 3fdc54646234 (\"NFSD: Reduce amount of struct\nnfsd4_compoundargs that needs clearing\"), the inline iops array is not\ncleared between RPC calls. A failed SECINFO_NO_NAME decode can therefore\nleave sin_exp holding stale union contents from a previous operation.\n\nThe error response path still invokes nfsd4_secinfo_no_name_release(),\nwhich calls exp_put() on a non-NULL sin_exp.\n\nInitialize sin_exp before the first failable decode step, matching\nnfsd4_decode_secinfo().",
  "id": "GHSA-hfvv-wwwp-6wgr",
  "modified": "2026-07-20T15:31:45Z",
  "published": "2026-07-19T12:30:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53398"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/161d1aaeb04d620d3692639700512bb5038c1e10"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1e04be34cafae119e82bcaccd6d28a20f72a3647"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/46eb17d45be69d28c7a23ea03283b207426a8232"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ec37edcb534f3fc92304be236d37f08e6545585"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8836405abdc53ca3dd5fc68b2cf6f8f012fad011"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e18e83b8846a5c3fe13fc8a464b4865d33996c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c8a24effd96d4779e2ad779654682304491c55a5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.