github - ghsa-5px9-qgxf-p79c

GHSA-5PX9-QGXF-P79C

Vulnerability from github – Published: 2025-04-01 18:30 – Updated: 2025-04-15 18:31

Details

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

NFSv4: Fix a deadlock when recovering state on a sillyrenamed file

If the file is sillyrenamed, and slated for delete on close, it is possible for a server reboot to triggeer an open reclaim, with can again race with the application call to close(). When that happens, the call to put_nfs_open_context() can trigger a synchronous delegreturn call which deadlocks because it is not marked as privileged.

Instead, ensure that the call to nfs4_inode_return_delegation_on_close() catches the delegreturn, and schedules it asynchronously.

Severity ?

5.5 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-21900"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-01T16:15:20Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4: Fix a deadlock when recovering state on a sillyrenamed file\n\nIf the file is sillyrenamed, and slated for delete on close, it is\npossible for a server reboot to triggeer an open reclaim, with can again\nrace with the application call to close(). When that happens, the call\nto put_nfs_open_context() can trigger a synchronous delegreturn call\nwhich deadlocks because it is not marked as privileged.\n\nInstead, ensure that the call to nfs4_inode_return_delegation_on_close()\ncatches the delegreturn, and schedules it asynchronously.",
  "id": "GHSA-5px9-qgxf-p79c",
  "modified": "2025-04-15T18:31:42Z",
  "published": "2025-04-01T18:30:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21900"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4fe4ae6c2e01d028856b73b6328b12b8945df871"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f8df955f078e1a023ee55161935000a67651f38"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f41a60bc43e7abbc636fee78bed0d74c31e738b0"
    }
  ],
  "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-2025-21900 (GCVE-0-2025-21900)

Vulnerability from cvelistv5 – Published: 2025-04-01 15:26 – Updated: 2025-10-01 17:18

Title

NFSv4: Fix a deadlock when recovering state on a sillyrenamed file

Summary

In the Linux kernel, the following vulnerability has been resolved: NFSv4: Fix a deadlock when recovering state on a sillyrenamed file If the file is sillyrenamed, and slated for delete on close, it is possible for a server reboot to triggeer an open reclaim, with can again race with the application call to close(). When that happens, the call to put_nfs_open_context() can trigger a synchronous delegreturn call which deadlocks because it is not marked as privileged. Instead, ensure that the call to nfs4_inode_return_delegation_on_close() catches the delegreturn, and schedules it asynchronously.

Severity ?

5.5 (Medium)


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

CWE

CWE-667 - Improper Locking

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/4fe4ae6c2e01d0288…
	https://git.kernel.org/stable/c/f41a60bc43e7abbc6…
	https://git.kernel.org/stable/c/8f8df955f078e1a02…

Impacted products

Vendor

Product

Version

Linux

Affected: adb4b42d19aea91826621a8d0bac94cf2c08f8bc , < 4fe4ae6c2e01d028856b73b6328b12b8945df871 (git)
Affected: adb4b42d19aea91826621a8d0bac94cf2c08f8bc , < f41a60bc43e7abbc636fee78bed0d74c31e738b0 (git)
Affected: adb4b42d19aea91826621a8d0bac94cf2c08f8bc , < 8f8df955f078e1a023ee55161935000a67651f38 (git)

Linux

Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.18 , ≤ 6.12.* (semver)
Unaffected: 6.13.6 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-21900",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T17:18:02.848036Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-667",
                "description": "CWE-667 Improper Locking",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T17:18:05.662Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfs/delegation.c",
            "fs/nfs/delegation.h",
            "fs/nfs/nfs4proc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4fe4ae6c2e01d028856b73b6328b12b8945df871",
              "status": "affected",
              "version": "adb4b42d19aea91826621a8d0bac94cf2c08f8bc",
              "versionType": "git"
            },
            {
              "lessThan": "f41a60bc43e7abbc636fee78bed0d74c31e738b0",
              "status": "affected",
              "version": "adb4b42d19aea91826621a8d0bac94cf2c08f8bc",
              "versionType": "git"
            },
            {
              "lessThan": "8f8df955f078e1a023ee55161935000a67651f38",
              "status": "affected",
              "version": "adb4b42d19aea91826621a8d0bac94cf2c08f8bc",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/nfs/delegation.c",
            "fs/nfs/delegation.h",
            "fs/nfs/nfs4proc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.18",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.18",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13.6",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4: Fix a deadlock when recovering state on a sillyrenamed file\n\nIf the file is sillyrenamed, and slated for delete on close, it is\npossible for a server reboot to triggeer an open reclaim, with can again\nrace with the application call to close(). When that happens, the call\nto put_nfs_open_context() can trigger a synchronous delegreturn call\nwhich deadlocks because it is not marked as privileged.\n\nInstead, ensure that the call to nfs4_inode_return_delegation_on_close()\ncatches the delegreturn, and schedules it asynchronously."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:23:49.060Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4fe4ae6c2e01d028856b73b6328b12b8945df871"
        },
        {
          "url": "https://git.kernel.org/stable/c/f41a60bc43e7abbc636fee78bed0d74c31e738b0"
        },
        {
          "url": "https://git.kernel.org/stable/c/8f8df955f078e1a023ee55161935000a67651f38"
        }
      ],
      "title": "NFSv4: Fix a deadlock when recovering state on a sillyrenamed file",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21900",
    "datePublished": "2025-04-01T15:26:51.290Z",
    "dateReserved": "2024-12-29T08:45:45.783Z",
    "dateUpdated": "2025-10-01T17:18:05.662Z",
    "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-5PX9-QGXF-P79C

CVE-2025-21900 (GCVE-0-2025-21900)

Tags

Sightings

Nomenclature