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TI-2026-06837 Aliases CVE-2026-7762GHSA-qm6x-8r68-vvv2

Heap buffer overflow in dot11ah.ko S1G Capabilities IE processing

Priority MEDIUM 50Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

A heap-based buffer overflow vulnerability in the dot11ah.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 or probe response frame containing a malformed S1G Capabilities Information Element (IE element ID 0xD9). The function morse_dot11ah_find_s1g_caps_for_bssid() uses the IE length field directly as the size argument to memcpy without validating it against the 15-byte destination buffer. An attacker can supply up to 255 bytes, causing an overflow of up to 240 bytes of attacker-controlled data into adjacent kernel heap memory. The vulnerability is triggerable during normal scanning without authentication, association, or user interaction.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00567 47th percentileScored 2026-11-07
Fix Fixed HaLowLink 2 (Morse Micro): 2.11.13

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Morse MicroHaLowLink 2before 2.11.132.11.13Patch availableCNA
  • HaLowLink 2 VendorMorse Micro Affected before 2.11.13 Fixed in 2.11.13 Patch available CNA

Remediation

  • Fix · CNA HaLowLink 2 (Morse Micro) Fixed in 2.11.13

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Morse Micro HaLowLink 2 2.11.13

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2026-06838 Heap buffer overflow in morse.ko TIM IE processingPriority MEDIUM 50
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-7762
  2. 2026-10-03 Alias added: GHSA-qm6x-8r68-vvv2
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Other 1

  • TI-2026-06838 Heap buffer overflow in morse.ko TIM IE processing CVSS 3.1CRITICAL 9.8
  • TI-2026-06839 Out-of-bounds read in morse.ko Vendor IE processing CVSS 3.1MEDIUM 6.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences