Vulnerability-Lookup

GHSA-HMGR-X2J2-PXWH

Vulnerability from github – Published: 2024-05-21 18:31 – Updated: 2024-08-01 15:31

Details

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

ksmbd: fix slab out of bounds write in smb_inherit_dacl()

slab out-of-bounds write is caused by that offsets is bigger than pntsd allocation size. This patch add the check to validate 3 offsets using allocation size.

Severity

8.4 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2023-52755"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T16:15:15Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix slab out of bounds write in smb_inherit_dacl()\n\nslab out-of-bounds write is caused by that offsets is bigger than pntsd\nallocation size. This patch add the check to validate 3 offsets using\nallocation size.",
  "id": "GHSA-hmgr-x2j2-pxwh",
  "modified": "2024-08-01T15:31:45Z",
  "published": "2024-05-21T18:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52755"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09d9d8b40a3338193619c14ed4dc040f4f119e70"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/712e01f32e577e7e48ab0adb5fe550646a3d93cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8387c94d73ec66eb597c7a23a8d9eadf64bfbafa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aaf0a07d60887d6c36fc46a24de0083744f07819"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eebff19acaa35820cb09ce2ccb3d21bee2156ffb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2023-52755 (GCVE-0-2023-52755)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:30 – Updated: 2026-08-05 09:11

Title

ksmbd: fix slab out of bounds write in smb_inherit_dacl()

Summary

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix slab out of bounds write in smb_inherit_dacl() slab out-of-bounds write is caused by that offsets is bigger than pntsd allocation size. This patch add the check to validate 3 offsets using allocation size.

Severity

9.8 (Critical)


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

8.4 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-08-01 03:55 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

Linux mitre root

References

5 references

URL	Tags
https://git.kernel.org/stable/c/aaf0a07d60887d6c3…
https://git.kernel.org/stable/c/8387c94d73ec66eb5…
https://git.kernel.org/stable/c/09d9d8b40a3338193…
https://git.kernel.org/stable/c/712e01f32e577e7e4…
https://git.kernel.org/stable/c/eebff19acaa35820c…

Impacted products

3 products

Vendor	Product	Version
Linux	Linux	Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < aaf0a07d60887d6c36fc46a24de0083744f07819 (git) Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 8387c94d73ec66eb597c7a23a8d9eadf64bfbafa (git) Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 09d9d8b40a3338193619c14ed4dc040f4f119e70 (git) Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 712e01f32e577e7e48ab0adb5fe550646a3d93cb (git) Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < eebff19acaa35820cb09ce2ccb3d21bee2156ffb (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 5.15.140 , ≤ 5.15.* (semver) Unaffected: 6.1.64 , ≤ 6.1.* (semver) Unaffected: 6.5.13 , ≤ 6.5.* (semver) Unaffected: 6.6.3 , ≤ 6.6.* (semver) Unaffected: 6.7 , ≤ * (original_commit_for_fix)
linux	linux_kernel	Affected: 1da177e4c3f4 , < aaf0a07d6088 (git) Affected: 1da177e4c3f4 , < 8387c94d73ec (git) Affected: 1da177e4c3f4 , < 09d9d8b40a33 (git) Affected: 1da177e4c3f4 , < 712e01f32e57 (git) Affected: 1da177e4c3f4 , < eebff19acaa3 (git) cpe:2.3:o:linux:linux_kernel::::::::

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "affected",
            "product": "linux_kernel",
            "vendor": "linux",
            "versions": [
              {
                "lessThan": "aaf0a07d6088",
                "status": "affected",
                "version": "1da177e4c3f4",
                "versionType": "git"
              },
              {
                "lessThan": "8387c94d73ec",
                "status": "affected",
                "version": "1da177e4c3f4",
                "versionType": "git"
              },
              {
                "lessThan": "09d9d8b40a33",
                "status": "affected",
                "version": "1da177e4c3f4",
                "versionType": "git"
              },
              {
                "lessThan": "712e01f32e57",
                "status": "affected",
                "version": "1da177e4c3f4",
                "versionType": "git"
              },
              {
                "lessThan": "eebff19acaa3",
                "status": "affected",
                "version": "1da177e4c3f4",
                "versionType": "git"
              }
            ]
          }
        ],
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 8.4,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2023-52755",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-08-01T03:55:53.690996Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-787",
                "description": "CWE-787 Out-of-bounds Write",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-08-01T13:46:35.727Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T23:11:35.921Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/aaf0a07d60887d6c36fc46a24de0083744f07819"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/8387c94d73ec66eb597c7a23a8d9eadf64bfbafa"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/09d9d8b40a3338193619c14ed4dc040f4f119e70"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/712e01f32e577e7e48ab0adb5fe550646a3d93cb"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/eebff19acaa35820cb09ce2ccb3d21bee2156ffb"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/smbacl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "aaf0a07d60887d6c36fc46a24de0083744f07819",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "8387c94d73ec66eb597c7a23a8d9eadf64bfbafa",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "09d9d8b40a3338193619c14ed4dc040f4f119e70",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "712e01f32e577e7e48ab0adb5fe550646a3d93cb",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "eebff19acaa35820cb09ce2ccb3d21bee2156ffb",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/smbacl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.5.*",
              "status": "unaffected",
              "version": "6.5.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.7",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.140",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.64",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5.13",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.3",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix slab out of bounds write in smb_inherit_dacl()\n\nslab out-of-bounds write is caused by that offsets is bigger than pntsd\nallocation size. This patch add the check to validate 3 offsets using\nallocation size."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The bug is in ksmbd (fs/smb/server/) and is reached over SMB on TCP/445 via SMB2 CREATE after an attacker plants a malicious security descriptor; the kernel guidance treats ksmbd as Network.\nAC:L - The attacker fully controls planting the parent SD (SET_INFO SECURITY / create SD buffer) with oversized osid/gsid/dacl offsets and then triggers smb_inherit_dacl() by creating a child under that directory, so the OOB write is reliable with no conditions outside attacker control.\nPR:N - ZDI states authentication may not be required depending on configuration; the worst reasonable case is a guest_ok writable share where a passwordless guest session can create directories, set WinACLs, and create children, which scores as no privileges.\nUI:N - Exploitation is performed entirely by the remote attacker through SMB negotiate/session/tree-connect/create/set-info; no victim action such as mounting or opening a file is required.\nS:U - The slab out-of-bounds write corrupts kernel heap within the same host kernel security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - A heap OOB write with attacker-influenced offset and SID/ACE payload is an exploitable memory-corruption primitive that enables arbitrary kernel read/disclosure as part of RCE, matching ZDI\u2019s remote code execution assessment.\nI:H - The vulnerability is a confirmed slab out-of-bounds write (CWE-787) of attacker-controlled ACL/SID bytes at attacker-controlled offsets, which yields arbitrary write and control-flow hijacking for kernel code execution.\nA:H - Writing past the kzalloc\u2019d NTSD object corrupts adjacent slab memory and can oops/panic ksmbd worker threads even when not fully exploited for RCE, so availability impact is complete."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T09:11:14.857Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/aaf0a07d60887d6c36fc46a24de0083744f07819"
        },
        {
          "url": "https://git.kernel.org/stable/c/8387c94d73ec66eb597c7a23a8d9eadf64bfbafa"
        },
        {
          "url": "https://git.kernel.org/stable/c/09d9d8b40a3338193619c14ed4dc040f4f119e70"
        },
        {
          "url": "https://git.kernel.org/stable/c/712e01f32e577e7e48ab0adb5fe550646a3d93cb"
        },
        {
          "url": "https://git.kernel.org/stable/c/eebff19acaa35820cb09ce2ccb3d21bee2156ffb"
        }
      ],
      "title": "ksmbd: fix slab out of bounds write in smb_inherit_dacl()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-52755",
    "datePublished": "2024-05-21T15:30:42.898Z",
    "dateReserved": "2024-05-21T15:19:24.235Z",
    "dateUpdated": "2026-08-05T09:11:14.857Z",
    "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

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.