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nfsd: Initialize ssc before laundromat_work to prevent NULL dereference

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: nfsd: Initialize ssc before laundromat_work to prevent NULL dereference In nfs4_state_start_net(), laundromat_work may access nfsd_ssc through nfs4_laundromat -> nfsd4_ssc_expire_umount. If nfsd_ssc isn't initialized, this can cause NULL pointer dereference. Normally the delayed start of laundromat_work allows sufficient time for nfsd_ssc initialization to complete. However, when the kernel waits too long for userspace responses (e.g. in nfs4_state_start_net -> nfsd4_end_grace -> nfsd4_record_grace_done -> nfsd4_cld_grace_done -> cld_pipe_upcall -> __cld_pipe_upcall -> wait_for_completion path), the delayed work may start before nfsd_ssc initialization finishes. Fix this by moving nfsd_ssc initialization before starting laundromat_work.

Announced Source revision 1
Original source ↗

CVE-2025-38231

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-2025-38231

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": "a4bc287943f5695209ff36bdc89f17b48d68fae7",
        "lessThan": "deaeb74ae9318252829c59a84a7d2316fc335660",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
        "lessThan": "0fccf5f01ed28725cc313a66ca1247eef911d55e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
        "lessThan": "a97668ec6d73dab237cd1c15efe012a10090a4ed",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
        "lessThan": "5060e1a5fef184bd11d298e3f0ee920d96a23236",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
        "lessThan": "d622c2ee6c08147ab8c9b9e37d93b6e95d3258e0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
        "lessThan": "83ac1ba8ca102ab5c0ed4351f8ac6e74ac4d5d64",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f4e44b393389c77958f7c58bf4415032b4cda15b",
        "lessThan": "b31da62889e6d610114d81dc7a6edbcaa503fcf8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5.10.220",
        "lessThan": "5.10.239",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "fs/nfsd/nfssvc.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.14"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.14",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.239",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.186",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.142",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.95",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.35",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.15.4",
        "versionType": "semver",
        "lessThanOrEqual": "6.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.16",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/nfsd/nfssvc.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2025-38231

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#27025 · Revision 1
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Publisher date
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