CVE-2026-53398 (GCVE-0-2026-53398)

Vulnerability from cvelistv5 – Published: 2026-07-19 12:01 – Updated: 2026-07-20 13:40
VLAI
Title
NFSD: Fix SECINFO_NO_NAME decode error cleanup
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, 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
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5e76b25d7cc82c148d391c0c43b884e6427cb302 , < 8836405abdc53ca3dd5fc68b2cf6f8f012fad011 (git)
Affected: 07b68ff5c71cf4ed5443016d8eb116863c0a4d88 , < 49de5d31dd8fdebf78bdeaf196b0ca5cd5c75439 (git)
Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 5ec37edcb534f3fc92304be236d37f08e6545585 (git)
Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 1e04be34cafae119e82bcaccd6d28a20f72a3647 (git)
Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 161d1aaeb04d620d3692639700512bb5038c1e10 (git)
Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < c8a24effd96d4779e2ad779654682304491c55a5 (git)
Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 46eb17d45be69d28c7a23ea03283b207426a8232 (git)
Affected: 3fdc546462348b8a497c72bc894e0cde9f10fc40 , < 9e18e83b8846a5c3fe13fc8a464b4865d33996c6 (git)
Affected: 5.10.220 , < 5.10.260 (semver)
Affected: 5.15.154 , < 5.15.211 (semver)
Create a notification for this product.
Linux Linux Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 5.10.260 , ≤ 5.10.* (semver)
Unaffected: 5.15.211 , ≤ 5.15.* (semver)
Unaffected: 6.1.177 , ≤ 6.1.* (semver)
Unaffected: 6.6.144 , ≤ 6.6.* (semver)
Unaffected: 6.12.95 , ≤ 6.12.* (semver)
Unaffected: 6.18.38 , ≤ 6.18.* (semver)
Unaffected: 7.1.3 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "redhat_vex": {
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      "current_release_date": "2026-07-20T15:27:46+00:00",
      "cve": "CVE-2026-53398",
      "id": "CVE-2026-53398",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: NFSD: Fix SECINFO_NO_NAME decode error cleanup",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53398.json",
      "version": "3"
    }
  }
}



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