Vulnerability-Lookup

CVE-2026-7763 (GCVE-0-2026-7763)

Vulnerability from cvelistv5 – Published: 2026-06-05 01:39 – Updated: 2026-06-05 20:20

Title

Heap buffer overflow in morse.ko TIM IE processing

Summary

A heap-based buffer overflow vulnerability in the morse.ko HaLow Wi-Fi kernel driver in Morse Micro HaLowLink 2 software versions prior to 2.11.13 allows an unauthenticated attacker within radio range to cause a Denial of Service (kernel panic) or potentially achieve Remote Code Execution via a crafted 802.11ah beacon frame containing a malformed Traffic Indication Map (TIM) Information Element. The function morse_page_slicing_process_tim_element() in page_slicing.c derives the TIM bitmap length directly from a received IE field without validating it against the fixed-size destination buffer before passing it to memset and memcpy operations, allowing up to 252 bytes of attacker-controlled data to be written beyond the buffer boundary. Because beacons are broadcast frames processed during passive scanning, no authentication, association, or user interaction is required.

Severity

9.8 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-122 Heap-based Buffer Overflow

Assigner

Bugcrowd

References

1 reference

URL	Tags
https://www.morsemicro.com/security-advisories/MM…

Impacted products

1 product

Vendor	Product	Version
Morse Micro	HaLowLink 2	Affected: 0 , < 2.11.13 (semver)

Show details on NVD website

JSON

To clipboard

{
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        "metrics": [
          {
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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
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              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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            }
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    "cna": {
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          "vendor": "Morse Micro",
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      },
      "references": [
        {
          "url": "https://www.morsemicro.com/security-advisories/MM-SA-2026-001"
        }
      ],
      "title": "Heap buffer overflow in morse.ko TIM IE processing"
    }
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    "dateReserved": "2026-05-04T05:03:00.671Z",
    "dateUpdated": "2026-06-05T20:20:25.385Z",
    "state": "PUBLISHED"
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      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Heap buffer overflow in morse.ko TIM IE processing",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-7763.json",
      "version": "3"
    },
    "vulnrichment": {
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FKIE_CVE-2026-7763

Vulnerability from fkie_nvd - Published: 2026-06-05 02:17 - Updated: 2026-07-23 07:10

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	4ac701fe-44e9-4bcd-9585-dd6449257611	https://www.morsemicro.com/security-advisories/MM-SA-2026-001

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "HaLowLink 2",
          "vendor": "Morse Micro",
          "versions": [
            {
              "lessThan": "2.11.13",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "4ac701fe-44e9-4bcd-9585-dd6449257611"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A heap-based buffer overflow vulnerability in the morse.ko HaLow Wi-Fi kernel driver in Morse Micro HaLowLink 2 software versions prior to 2.11.13 allows an unauthenticated attacker within radio range to cause a Denial of Service (kernel panic) or potentially achieve Remote Code Execution via a crafted 802.11ah beacon frame containing a malformed Traffic Indication Map (TIM) Information Element. The function morse_page_slicing_process_tim_element() in page_slicing.c derives the TIM bitmap length directly from a received IE field without validating it against the fixed-size destination buffer before passing it to memset and memcpy operations, allowing up to 252 bytes of attacker-controlled data to be written beyond the buffer boundary. Because beacons are broadcast frames processed during passive scanning, no authentication, association, or user interaction is required."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de desbordamiento de b\u00fafer basado en mont\u00edculo en el controlador de kernel Wi-Fi HaLow morse.ko en versiones de software Morse Micro HaLowLink 2 anteriores a la 2.11.13 permite a un atacante no autenticado dentro del alcance de radio causar una denegaci\u00f3n de servicio (p\u00e1nico del kernel) o potencialmente lograr ejecuci\u00f3n remota de c\u00f3digo a trav\u00e9s de una trama de baliza 802.11ah manipulada que contiene un Elemento de Informaci\u00f3n de Mapa de Indicaci\u00f3n de Tr\u00e1fico (TIM) malformado. La funci\u00f3n morse_page_slicing_process_tim_element() en page_slicing.c deriva la longitud del mapa de bits TIM directamente de un campo IE recibido sin validarlo contra el b\u00fafer de destino de tama\u00f1o fijo antes de pasarlo a operaciones memset y memcpy, permitiendo hasta 252 bytes de datos controlados por el atacante ser escritos m\u00e1s all\u00e1 del l\u00edmite del b\u00fafer. Debido a que las balizas son tramas de difusi\u00f3n procesadas durante el escaneo pasivo, no se requiere autenticaci\u00f3n, asociaci\u00f3n o interacci\u00f3n del usuario."
    }
  ],
  "id": "CVE-2026-7763",
  "lastModified": "2026-07-23T07:10:00.113",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-7763",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-05T20:20:06.506327Z",
          "version": "2.0.3"
        }
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  "published": "2026-06-05T02:17:14.640",
  "references": [
    {
      "source": "4ac701fe-44e9-4bcd-9585-dd6449257611",
      "url": "https://www.morsemicro.com/security-advisories/MM-SA-2026-001"
    }
  ],
  "sourceIdentifier": "4ac701fe-44e9-4bcd-9585-dd6449257611",
  "vulnStatus": "Awaiting Analysis"
}

GHSA-WQ9P-QHJJ-GW6H

Vulnerability from github – Published: 2026-06-05 03:31 – Updated: 2026-06-05 21:32

Details

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/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-2026-7763"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-05T02:17:14Z",
    "severity": "CRITICAL"
  },
  "details": "A heap-based buffer overflow vulnerability in the morse.ko HaLow Wi-Fi kernel driver in Morse Micro HaLowLink 2 software versions prior to 2.11.13 allows an unauthenticated attacker within radio range to cause a Denial of Service (kernel panic) or potentially achieve Remote Code Execution via a crafted 802.11ah beacon frame containing a malformed Traffic Indication Map (TIM) Information Element. The function morse_page_slicing_process_tim_element() in page_slicing.c derives the TIM bitmap length directly from a received IE field without validating it against the fixed-size destination buffer before passing it to memset and memcpy operations, allowing up to 252 bytes of attacker-controlled data to be written beyond the buffer boundary. Because beacons are broadcast frames processed during passive scanning, no authentication, association, or user interaction is required.",
  "id": "GHSA-wq9p-qhjj-gw6h",
  "modified": "2026-06-05T21:32:03Z",
  "published": "2026-06-05T03:31:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7763"
    },
    {
      "type": "WEB",
      "url": "https://www.morsemicro.com/security-advisories/MM-SA-2026-001"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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.

Action not permitted

CVE-2026-7763 (GCVE-0-2026-7763)

FKIE_CVE-2026-7763

GHSA-WQ9P-QHJJ-GW6H

Tags

Sightings

Nomenclature