github - ghsa-j568-pqpx-g2wf

GHSA-J568-PQPX-G2WF

Vulnerability from github – Published: 2025-12-24 12:30 – Updated: 2025-12-24 12:30

Details

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

Bluetooth: hci_conn: return ERR_PTR instead of NULL when there is no link

hci_connect_sco currently returns NULL when there is no link (i.e. when hci_conn_link() returns NULL).

sco_connect() expects an ERR_PTR in case of any error (see line 266 in sco.c). Thus, hcon set as NULL passes through to sco_conn_add(), which tries to get hcon->hdev, resulting in dereferencing a NULL pointer as reported by syzkaller.

The same issue exists for iso_connect_cis() calling hci_connect_cis().

Thus, make hci_connect_sco() and hci_connect_cis() return ERR_PTR instead of NULL.

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{
  "affected": [],
  "aliases": [
    "CVE-2023-54038"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T11:15:56Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: return ERR_PTR instead of NULL when there is no link\n\nhci_connect_sco currently returns NULL when there is no link (i.e. when\nhci_conn_link() returns NULL).\n\nsco_connect() expects an ERR_PTR in case of any error (see line 266 in\nsco.c). Thus, hcon set as NULL passes through to sco_conn_add(), which\ntries to get hcon-\u003ehdev, resulting in dereferencing a NULL pointer as\nreported by syzkaller.\n\nThe same issue exists for iso_connect_cis() calling hci_connect_cis().\n\nThus, make hci_connect_sco() and hci_connect_cis() return ERR_PTR\ninstead of NULL.",
  "id": "GHSA-j568-pqpx-g2wf",
  "modified": "2025-12-24T12:30:28Z",
  "published": "2025-12-24T12:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54038"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/357ab53c83a5322437fa434e9a9e3e0bafe6b383"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b4066eb04bb67e7ff66e5aaab0db4a753f37eaad"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2023-54038 (GCVE-0-2023-54038)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:56 – Updated: 2025-12-24 10:56

Title

Bluetooth: hci_conn: return ERR_PTR instead of NULL when there is no link

Summary

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: return ERR_PTR instead of NULL when there is no link hci_connect_sco currently returns NULL when there is no link (i.e. when hci_conn_link() returns NULL). sco_connect() expects an ERR_PTR in case of any error (see line 266 in sco.c). Thus, hcon set as NULL passes through to sco_conn_add(), which tries to get hcon->hdev, resulting in dereferencing a NULL pointer as reported by syzkaller. The same issue exists for iso_connect_cis() calling hci_connect_cis(). Thus, make hci_connect_sco() and hci_connect_cis() return ERR_PTR instead of NULL.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/357ab53c83a532243…
	https://git.kernel.org/stable/c/b4066eb04bb67e7ff…

Impacted products

Vendor

Product

Version

Linux

Affected: 06149746e7203d5ffe2d6faf9799ee36203aa8b8 , < 357ab53c83a5322437fa434e9a9e3e0bafe6b383 (git)
Affected: 06149746e7203d5ffe2d6faf9799ee36203aa8b8 , < b4066eb04bb67e7ff66e5aaab0db4a753f37eaad (git)
Affected: f72fc94a17d45be98aecfd59c39b5b24a6a342e2 (git)

Linux

Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.4.7 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_conn.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "357ab53c83a5322437fa434e9a9e3e0bafe6b383",
              "status": "affected",
              "version": "06149746e7203d5ffe2d6faf9799ee36203aa8b8",
              "versionType": "git"
            },
            {
              "lessThan": "b4066eb04bb67e7ff66e5aaab0db4a753f37eaad",
              "status": "affected",
              "version": "06149746e7203d5ffe2d6faf9799ee36203aa8b8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f72fc94a17d45be98aecfd59c39b5b24a6a342e2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_conn.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.4.7",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.3.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: return ERR_PTR instead of NULL when there is no link\n\nhci_connect_sco currently returns NULL when there is no link (i.e. when\nhci_conn_link() returns NULL).\n\nsco_connect() expects an ERR_PTR in case of any error (see line 266 in\nsco.c). Thus, hcon set as NULL passes through to sco_conn_add(), which\ntries to get hcon-\u003ehdev, resulting in dereferencing a NULL pointer as\nreported by syzkaller.\n\nThe same issue exists for iso_connect_cis() calling hci_connect_cis().\n\nThus, make hci_connect_sco() and hci_connect_cis() return ERR_PTR\ninstead of NULL."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T10:56:04.623Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/357ab53c83a5322437fa434e9a9e3e0bafe6b383"
        },
        {
          "url": "https://git.kernel.org/stable/c/b4066eb04bb67e7ff66e5aaab0db4a753f37eaad"
        }
      ],
      "title": "Bluetooth: hci_conn: return ERR_PTR instead of NULL when there is no link",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54038",
    "datePublished": "2025-12-24T10:56:04.623Z",
    "dateReserved": "2025-12-24T10:53:46.181Z",
    "dateUpdated": "2025-12-24T10:56:04.623Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-J568-PQPX-G2WF

CVE-2023-54038 (GCVE-0-2023-54038)

Tags

Sightings

Nomenclature