Vulnerability-Lookup

GHSA-QHQR-659Q-MHG7

Vulnerability from github – Published: 2025-11-13 00:30 – Updated: 2025-11-13 00:30

Details

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

mount: handle NULL values in mnt_ns_release()

When calling in listmount() mnt_ns_release() may be passed a NULL pointer. Handle that case gracefully.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40195"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-11-12T22:15:46Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmount: handle NULL values in mnt_ns_release()\n\nWhen calling in listmount() mnt_ns_release() may be passed a NULL\npointer. Handle that case gracefully.",
  "id": "GHSA-qhqr-659q-mhg7",
  "modified": "2025-11-13T00:30:18Z",
  "published": "2025-11-13T00:30:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40195"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d68f8a7379d9c61005e982600c61948d4d019bd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6c7ca6a02f8f9549a438a08a23c6327580ecf3d6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/99ae3e70a293834d0274c46a37120c71a24a4995"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-40195 (GCVE-0-2025-40195)

Vulnerability from cvelistv5 – Published: 2025-11-12 21:56 – Updated: 2026-05-11 21:44

Title

mount: handle NULL values in mnt_ns_release()

Summary

In the Linux kernel, the following vulnerability has been resolved: mount: handle NULL values in mnt_ns_release() When calling in listmount() mnt_ns_release() may be passed a NULL pointer. Handle that case gracefully.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/2d68f8a7379d9c610…
https://git.kernel.org/stable/c/99ae3e70a293834d0…
https://git.kernel.org/stable/c/6c7ca6a02f8f9549a…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1901c92497bd90caf608a474f1bf4d8795b372a2 , < 2d68f8a7379d9c61005e982600c61948d4d019bd (git) Affected: 1901c92497bd90caf608a474f1bf4d8795b372a2 , < 99ae3e70a293834d0274c46a37120c71a24a4995 (git) Affected: 1901c92497bd90caf608a474f1bf4d8795b372a2 , < 6c7ca6a02f8f9549a438a08a23c6327580ecf3d6 (git)
Linux	Linux	Affected: 6.11 Unaffected: 0 , < 6.11 (semver) Unaffected: 6.12.54 , ≤ 6.12.* (semver) Unaffected: 6.17.4 , ≤ 6.17.* (semver) Unaffected: 6.18 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/namespace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "2d68f8a7379d9c61005e982600c61948d4d019bd",
              "status": "affected",
              "version": "1901c92497bd90caf608a474f1bf4d8795b372a2",
              "versionType": "git"
            },
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              "status": "affected",
              "version": "1901c92497bd90caf608a474f1bf4d8795b372a2",
              "versionType": "git"
            },
            {
              "lessThan": "6c7ca6a02f8f9549a438a08a23c6327580ecf3d6",
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              "versionType": "git"
            }
          ]
        },
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            {
              "status": "affected",
              "version": "6.11"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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            },
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              "version": "6.17.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
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              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
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                  "versionStartIncluding": "6.11",
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                },
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmount: handle NULL values in mnt_ns_release()\n\nWhen calling in listmount() mnt_ns_release() may be passed a NULL\npointer. Handle that case gracefully."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:44:35.867Z",
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          "url": "https://git.kernel.org/stable/c/6c7ca6a02f8f9549a438a08a23c6327580ecf3d6"
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      "title": "mount: handle NULL values in mnt_ns_release()",
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    "cveId": "CVE-2025-40195",
    "datePublished": "2025-11-12T21:56:32.311Z",
    "dateReserved": "2025-04-16T07:20:57.178Z",
    "dateUpdated": "2026-05-11T21:44:35.867Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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