Vulnerability-Lookup

CVE-2026-5589 (GCVE-0-2026-5589)

Vulnerability from cvelistv5 – Published: 2026-06-04 19:54 – Updated: 2026-06-05 18:27

Title

Out-of-bounds write caused by an integer underflow in the Bluetooth Mesh subsystem.

Summary

An integer underflow in bt_mesh_sol_recv() in the Bluetooth Mesh solicitation handling (subsys/bluetooth/mesh/solicitation.c) leads to an out-of-bounds write. When CONFIG_BT_MESH_OD_PRIV_PROXY_SRV is enabled, the function parses solicitation PDUs from raw BLE advertising payloads. The AD parsing loop reads an attacker-controlled length byte (reported_len) and computes reported_len - 3 without checking that reported_len >= 3. When reported_len is less than 3, the subtraction is performed in signed int arithmetic and yields a negative value that bypasses the length guard and is then implicitly converted to a very large size_t when passed to net_buf_simple_pull_mem(). In builds without assertions, this wraps the buffer length and advances the data pointer far out of bounds, so subsequent reads dereference invalid memory. A nearby BLE device can trigger this with a non-connectable advertisement carrying a UUID16 AD structure and a crafted length byte, with no pairing or prior association required, potentially leading to denial of service or arbitrary code execution.

Severity

6.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-05 18:27 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

zephyr mitre root

References

1 reference

URL	Tags
https://github.com/zephyrproject-rtos/zephyr/secu…

Impacted products

1 product

Vendor	Product	Version
zephyrproject-rtos	Zephyr	Affected: * , ≤ 4.3.0 (git)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-5589

Vulnerability from fkie_nvd - Published: 2026-06-04 20:16 - Updated: 2026-07-22 20:10

Severity

6.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Summary

References

	URL	Tags
	vulnerabilities@zephyrproject.org	https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-4pm9-4v7f-x6gr	Exploit, Patch, Vendor Advisory

Impacted products

	Vendor	Product	Version
	zephyrproject	zephyr	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageName": "Zephyr",
          "product": "Zephyr",
          "repo": "https://github.com/zephyrproject-rtos/zephyr",
          "vendor": "zephyrproject-rtos",
          "versions": [
            {
              "lessThanOrEqual": "4.3.0",
              "status": "affected",
              "version": "*",
              "versionType": "git"
            }
          ]
        }
      ],
      "source": "vulnerabilities@zephyrproject.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7D912614-A39E-4C9B-AA54-187BC26337B9",
              "versionEndIncluding": "4.3.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An integer underflow in bt_mesh_sol_recv() in the Bluetooth Mesh solicitation handling (subsys/bluetooth/mesh/solicitation.c) leads to an out-of-bounds write. When CONFIG_BT_MESH_OD_PRIV_PROXY_SRV is enabled, the function parses solicitation PDUs from raw BLE advertising payloads. The AD parsing loop reads an attacker-controlled length byte (reported_len) and computes reported_len - 3 without checking that reported_len \u003e= 3. When reported_len is less than 3, the subtraction is performed in signed int arithmetic and yields a negative value that bypasses the length guard and is then implicitly converted to a very large size_t when passed to net_buf_simple_pull_mem(). In builds without assertions, this wraps the buffer length and advances the data pointer far out of bounds, so subsequent reads dereference invalid memory. A nearby BLE device can trigger this with a non-connectable advertisement carrying a UUID16 AD structure and a crafted length byte, with no pairing or prior association required, potentially leading to denial of service or arbitrary code execution."
    },
    {
      "lang": "es",
      "value": "Un desbordamiento negativo de entero en bt_mesh_sol_recv() en el manejo de solicitudes de Bluetooth Mesh (subsys/bluetooth/mesh/solicitation.c) conduce a una escritura fuera de l\u00edmites. Cuando CONFIG_BT_MESH_OD_PRIV_PROXY_SRV est\u00e1 habilitado, la funci\u00f3n analiza PDUs de solicitud de cargas \u00fatiles de publicidad BLE en bruto. El bucle de an\u00e1lisis de AD lee un byte de longitud controlado por el atacante (reported_len) y calcula reported_len - 3 sin verificar que reported_len \u003e= 3. Cuando reported_len es menor que 3, la resta se realiza en aritm\u00e9tica de enteros con signo y produce un valor negativo que elude la protecci\u00f3n de longitud y luego se convierte impl\u00edcitamente a un size_t muy grande cuando se pasa a net_buf_simple_pull_mem(). En compilaciones sin aserciones, esto envuelve la longitud del b\u00fafer y avanza el puntero de datos mucho m\u00e1s all\u00e1 de los l\u00edmites, por lo que las lecturas posteriores desreferencian memoria no v\u00e1lida. Un dispositivo BLE cercano puede activar esto con un anuncio no conectable que lleva una estructura AD UUID16 y un byte de longitud manipulado, sin necesidad de emparejamiento o asociaci\u00f3n previa, lo que podr\u00eda conducir a denegaci\u00f3n de servicio o ejecuci\u00f3n de c\u00f3digo arbitrario."
    }
  ],
  "id": "CVE-2026-5589",
  "lastModified": "2026-07-22T20:10:00.127",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 6.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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        },
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        "impactScore": 3.4,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
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    ],
    "ssvcV203": [
      {
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  "published": "2026-06-04T20:16:58.540",
  "references": [
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      "type": "Secondary"
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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.

Action not permitted

CVE-2026-5589 (GCVE-0-2026-5589)

FKIE_CVE-2026-5589

Tags

Sightings

Nomenclature

Related by attack behaviour