github - ghsa-53x5-v4j3-g5xm

GHSA-53X5-V4J3-G5XM

Vulnerability from github – Published: 2025-04-18 15:31 – Updated: 2025-11-07 00:30

Details

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

nfsd: allow SC_STATUS_FREEABLE when searching via nfs4_lookup_stateid()

The pynfs DELEG8 test fails when run against nfsd. It acquires a delegation and then lets the lease time out. It then tries to use the deleg stateid and expects to see NFS4ERR_DELEG_REVOKED, but it gets bad NFS4ERR_BAD_STATEID instead.

When a delegation is revoked, it's initially marked with SC_STATUS_REVOKED, or SC_STATUS_ADMIN_REVOKED and later, it's marked with the SC_STATUS_FREEABLE flag, which denotes that it is waiting for s FREE_STATEID call.

nfs4_lookup_stateid() accepts a statusmask that includes the status flags that a found stateid is allowed to have. Currently, that mask never includes SC_STATUS_FREEABLE, which means that revoked delegations are (almost) never found.

Add SC_STATUS_FREEABLE to the always-allowed status flags, and remove it from nfsd4_delegreturn() since it's now always implied.

Severity ?

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39688"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-18T07:15:43Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: allow SC_STATUS_FREEABLE when searching via nfs4_lookup_stateid()\n\nThe pynfs DELEG8 test fails when run against nfsd. It acquires a\ndelegation and then lets the lease time out. It then tries to use the\ndeleg stateid and expects to see NFS4ERR_DELEG_REVOKED, but it gets\nbad NFS4ERR_BAD_STATEID instead.\n\nWhen a delegation is revoked, it\u0027s initially marked with\nSC_STATUS_REVOKED, or SC_STATUS_ADMIN_REVOKED and later, it\u0027s marked\nwith the SC_STATUS_FREEABLE flag, which denotes that it is waiting for\ns FREE_STATEID call.\n\nnfs4_lookup_stateid() accepts a statusmask that includes the status\nflags that a found stateid is allowed to have. Currently, that mask\nnever includes SC_STATUS_FREEABLE, which means that revoked delegations\nare (almost) never found.\n\nAdd SC_STATUS_FREEABLE to the always-allowed status flags, and remove it\nfrom nfsd4_delegreturn() since it\u0027s now always implied.",
  "id": "GHSA-53x5-v4j3-g5xm",
  "modified": "2025-11-07T00:30:26Z",
  "published": "2025-04-18T15:31:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39688"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/52e209203c35a4fbff8af23cd3613efe5df40102"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5bcb44e650bc4ec7eac23df90c5e011a77fa2beb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1bc15b147d35b4cb7ca99a9a7d79d41ca342c13"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc6f3295905d7185e71091870119a8c11c3808cc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-39688 (GCVE-0-2025-39688)

Vulnerability from cvelistv5 – Published: 2025-04-18 07:01 – Updated: 2025-05-26 05:25

Summary

In the Linux kernel, the following vulnerability has been resolved: nfsd: allow SC_STATUS_FREEABLE when searching via nfs4_lookup_stateid() The pynfs DELEG8 test fails when run against nfsd. It acquires a delegation and then lets the lease time out. It then tries to use the deleg stateid and expects to see NFS4ERR_DELEG_REVOKED, but it gets bad NFS4ERR_BAD_STATEID instead. When a delegation is revoked, it's initially marked with SC_STATUS_REVOKED, or SC_STATUS_ADMIN_REVOKED and later, it's marked with the SC_STATUS_FREEABLE flag, which denotes that it is waiting for s FREE_STATEID call. nfs4_lookup_stateid() accepts a statusmask that includes the status flags that a found stateid is allowed to have. Currently, that mask never includes SC_STATUS_FREEABLE, which means that revoked delegations are (almost) never found. Add SC_STATUS_FREEABLE to the always-allowed status flags, and remove it from nfsd4_delegreturn() since it's now always implied.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/52e209203c35a4fbf…
	https://git.kernel.org/stable/c/dc6f3295905d7185e…
	https://git.kernel.org/stable/c/5bcb44e650bc4ec7e…
	https://git.kernel.org/stable/c/d1bc15b147d35b4cb…

Impacted products

Vendor

Product

Version

Linux

Affected: 8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a , < 52e209203c35a4fbff8af23cd3613efe5df40102 (git)
Affected: 8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a , < dc6f3295905d7185e71091870119a8c11c3808cc (git)
Affected: 8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a , < 5bcb44e650bc4ec7eac23df90c5e011a77fa2beb (git)
Affected: 8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a , < d1bc15b147d35b4cb7ca99a9a7d79d41ca342c13 (git)
Affected: 967faa26f313a62e7bebc55d5b8122eaee43b929 (git)

Linux

Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.12.23 , ≤ 6.12.* (semver)
Unaffected: 6.13.11 , ≤ 6.13.* (semver)
Unaffected: 6.14.2 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfsd/nfs4state.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "52e209203c35a4fbff8af23cd3613efe5df40102",
              "status": "affected",
              "version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a",
              "versionType": "git"
            },
            {
              "lessThan": "dc6f3295905d7185e71091870119a8c11c3808cc",
              "status": "affected",
              "version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a",
              "versionType": "git"
            },
            {
              "lessThan": "5bcb44e650bc4ec7eac23df90c5e011a77fa2beb",
              "status": "affected",
              "version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a",
              "versionType": "git"
            },
            {
              "lessThan": "d1bc15b147d35b4cb7ca99a9a7d79d41ca342c13",
              "status": "affected",
              "version": "8dd91e8d31febf4d9cca3ae1bb4771d33ae7ee5a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "967faa26f313a62e7bebc55d5b8122eaee43b929",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/nfsd/nfs4state.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.23",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.23",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13.11",
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                  "vulnerable": true
                },
                {
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.11.6",
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              "negate": false,
              "operator": "OR"
            }
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: allow SC_STATUS_FREEABLE when searching via nfs4_lookup_stateid()\n\nThe pynfs DELEG8 test fails when run against nfsd. It acquires a\ndelegation and then lets the lease time out. It then tries to use the\ndeleg stateid and expects to see NFS4ERR_DELEG_REVOKED, but it gets\nbad NFS4ERR_BAD_STATEID instead.\n\nWhen a delegation is revoked, it\u0027s initially marked with\nSC_STATUS_REVOKED, or SC_STATUS_ADMIN_REVOKED and later, it\u0027s marked\nwith the SC_STATUS_FREEABLE flag, which denotes that it is waiting for\ns FREE_STATEID call.\n\nnfs4_lookup_stateid() accepts a statusmask that includes the status\nflags that a found stateid is allowed to have. Currently, that mask\nnever includes SC_STATUS_FREEABLE, which means that revoked delegations\nare (almost) never found.\n\nAdd SC_STATUS_FREEABLE to the always-allowed status flags, and remove it\nfrom nfsd4_delegreturn() since it\u0027s now always implied."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T05:25:26.240Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/52e209203c35a4fbff8af23cd3613efe5df40102"
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        {
          "url": "https://git.kernel.org/stable/c/5bcb44e650bc4ec7eac23df90c5e011a77fa2beb"
        },
        {
          "url": "https://git.kernel.org/stable/c/d1bc15b147d35b4cb7ca99a9a7d79d41ca342c13"
        }
      ],
      "title": "nfsd: allow SC_STATUS_FREEABLE when searching via nfs4_lookup_stateid()",
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        "engine": "bippy-1.2.0"
      }
    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39688",
    "datePublished": "2025-04-18T07:01:35.177Z",
    "dateReserved": "2025-04-16T07:20:57.113Z",
    "dateUpdated": "2025-05-26T05:25:26.240Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-53X5-V4J3-G5XM

CVE-2025-39688 (GCVE-0-2025-39688)

Tags

Sightings

Nomenclature