Vulnerability-Lookup

GHSA-RCMJ-JXVJ-G49V

Vulnerability from github – Published: 2024-12-29 12:30 – Updated: 2025-01-08 00:30

Details

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

smb: Initialize cfid->tcon before performing network ops

Avoid leaking a tcon ref when a lease break races with opening the cached directory. Processing the leak break might take a reference to the tcon in cached_dir_lease_break() and then fail to release the ref in cached_dir_offload_close, since cfid->tcon is still NULL.

Severity

4.7 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2024-56729"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-12-29T12:15:07Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: Initialize cfid-\u003etcon before performing network ops\n\nAvoid leaking a tcon ref when a lease break races with opening the\ncached directory. Processing the leak break might take a reference to\nthe tcon in cached_dir_lease_break() and then fail to release the ref in\ncached_dir_offload_close, since cfid-\u003etcon is still NULL.",
  "id": "GHSA-rcmj-jxvj-g49v",
  "modified": "2025-01-08T00:30:48Z",
  "published": "2024-12-29T12:30:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56729"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b9ab6b648f89441c8a13cb3fd8ca83ffebc5262"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b216c8f9c7d84ef7de33ca60b97e08e03ef3292"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/625e2357c8fcfae6e66dcc667dc656fe390bab15"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c353ee4fb119a2582d0e011f66a76a38f5cf984d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-56729 (GCVE-0-2024-56729)

Vulnerability from cvelistv5 – Published: 2024-12-29 11:30 – Updated: 2026-05-11 20:58

Title

smb: Initialize cfid->tcon before performing network ops

Summary

In the Linux kernel, the following vulnerability has been resolved: smb: Initialize cfid->tcon before performing network ops Avoid leaking a tcon ref when a lease break races with opening the cached directory. Processing the leak break might take a reference to the tcon in cached_dir_lease_break() and then fail to release the ref in cached_dir_offload_close, since cfid->tcon is still NULL.

Severity

4.7 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 19:57 UTC

CWE

CWE-401 - Missing Release of Memory after Effective Lifetime

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/625e2357c8fcfae6e…
https://git.kernel.org/stable/c/4b216c8f9c7d84ef7…
https://git.kernel.org/stable/c/1b9ab6b648f89441c…
https://git.kernel.org/stable/c/c353ee4fb119a2582…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ebe98f1447bbccf8228335c62d86af02a0ed23f7 , < 625e2357c8fcfae6e66dcc667dc656fe390bab15 (git) Affected: ebe98f1447bbccf8228335c62d86af02a0ed23f7 , < 4b216c8f9c7d84ef7de33ca60b97e08e03ef3292 (git) Affected: ebe98f1447bbccf8228335c62d86af02a0ed23f7 , < 1b9ab6b648f89441c8a13cb3fd8ca83ffebc5262 (git) Affected: ebe98f1447bbccf8228335c62d86af02a0ed23f7 , < c353ee4fb119a2582d0e011f66a76a38f5cf984d (git)
Linux	Linux	Affected: 6.1 Unaffected: 0 , < 6.1 (semver) Unaffected: 6.6.64 , ≤ 6.6.* (semver) Unaffected: 6.11.11 , ≤ 6.11.* (semver) Unaffected: 6.12.2 , ≤ 6.12.* (semver) Unaffected: 6.13 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 4.7,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
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              "content": {
                "id": "CVE-2024-56729",
                "options": [
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                    "Exploitation": "none"
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          "shortName": "CISA-ADP"
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    "cna": {
      "affected": [
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          "product": "Linux",
          "programFiles": [
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          ],
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            {
              "lessThan": "c353ee4fb119a2582d0e011f66a76a38f5cf984d",
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          ]
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              "version": "0",
              "versionType": "semver"
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          ]
        }
      ],
      "cpeApplicability": [
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        "dateUpdated": "2026-05-11T20:58:07.967Z",
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        {
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    "datePublished": "2024-12-29T11:30:07.181Z",
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}

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

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.