github - ghsa-6qhr-h8jp-m2w8

GHSA-6QHR-H8JP-M2W8

Vulnerability from github – Published: 2025-04-14 21:32 – Updated: 2025-04-14 21:32

Details

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

ksmbd: fix reference count leak in smb_check_perm_dacl()

The issue happens in a specific path in smb_check_perm_dacl(). When "id" and "uid" have the same value, the function simply jumps out of the loop without decrementing the reference count of the object "posix_acls", which is increased by get_acl() earlier. This may result in memory leaks.

Fix it by decreasing the reference count of "posix_acls" before jumping to label "check_access_bits".

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-2022-49366"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:13Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix reference count leak in smb_check_perm_dacl()\n\nThe issue happens in a specific path in smb_check_perm_dacl(). When\n\"id\" and \"uid\" have the same value, the function simply jumps out of\nthe loop without decrementing the reference count of the object\n\"posix_acls\", which is increased by get_acl() earlier. This may\nresult in memory leaks.\n\nFix it by decreasing the reference count of \"posix_acls\" before\njumping to label \"check_access_bits\".",
  "id": "GHSA-6qhr-h8jp-m2w8",
  "modified": "2025-04-14T21:32:22Z",
  "published": "2025-04-14T21:32:22Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49366"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/248d71b440aef829f5cc5f6545ca113ef5062900"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9758a6653c27867d810de02b4e5697163dda9883"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf824b95c12a1abacadbc2d069931963221a3414"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d21a580dafc69aa04f46e6099616146a536b0724"
    }
  ],
  "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-2022-49366 (GCVE-0-2022-49366)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:11 – Updated: 2025-10-01 19:46

Summary

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix reference count leak in smb_check_perm_dacl() The issue happens in a specific path in smb_check_perm_dacl(). When "id" and "uid" have the same value, the function simply jumps out of the loop without decrementing the reference count of the object "posix_acls", which is increased by get_acl() earlier. This may result in memory leaks. Fix it by decreasing the reference count of "posix_acls" before jumping to label "check_access_bits".

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-noinfo Not enough information

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/cf824b95c12a1abac…
	https://git.kernel.org/stable/c/248d71b440aef829f…
	https://git.kernel.org/stable/c/9758a6653c27867d8…
	https://git.kernel.org/stable/c/d21a580dafc69aa04…

Impacted products

Vendor

Product

Version

Linux

Affected: 777cad1604d68ed4379ec899d1f7d2f6a29f01f0 , < cf824b95c12a1abacadbc2d069931963221a3414 (git)
Affected: 777cad1604d68ed4379ec899d1f7d2f6a29f01f0 , < 248d71b440aef829f5cc5f6545ca113ef5062900 (git)
Affected: 777cad1604d68ed4379ec899d1f7d2f6a29f01f0 , < 9758a6653c27867d810de02b4e5697163dda9883 (git)
Affected: 777cad1604d68ed4379ec899d1f7d2f6a29f01f0 , < d21a580dafc69aa04f46e6099616146a536b0724 (git)

Linux

Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.47 , ≤ 5.15.* (semver)
Unaffected: 5.17.15 , ≤ 5.17.* (semver)
Unaffected: 5.18.4 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

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        "metrics": [
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              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
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          "versions": [
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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-6QHR-H8JP-M2W8

CVE-2022-49366 (GCVE-0-2022-49366)

Tags

Sightings

Nomenclature