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Critical

Heap-based buffer overflow in Morse Micro HaLowLink 2 dot11ah.ko driver

IdentifiersCVE-2026-7762CWE-122

CVE-2026-7762 is a heap-based buffer overflow in the dot11ah.ko HaLow Wi-Fi kernel driver shipped with Morse Micro HaLowLink 2 before version 2.11.13. The flaw is in morse_dot11ah_find_s1g_caps_for_bssid(), which copies data from a received S1G Capabilities Information Element (IE ID 0xD9) into a 15-byte destination buffer but uses the attacker-controlled IE length field directly as the memcpy size without validating it against the destination size. A crafted 802.11ah beacon or probe response frame can therefore supply up to 255 bytes, overflowing the heap buffer by as much as 240 bytes with attacker-controlled data. The vulnerable path is reachable during normal Wi-Fi scanning, so exploitation does not require authentication, association, or user interaction.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can crash the kernel and cause denial of service via kernel panic. Because the overflow writes attacker-controlled data into adjacent kernel heap memory, the vulnerability also creates a plausible path to remote code execution in kernel context, depending on target-specific memory layout and exploitability conditions.

Mitigation

If you can’t patch tonight, do this now.

Until patched, reduce exposure by limiting attacker proximity to affected 802.11ah/HaLow deployments, disabling vulnerable HaLow scanning functionality where operationally feasible, and monitoring for malformed beacon or probe response frames carrying abnormal S1G Capabilities Information Elements. Segmentation and physical/radio access controls can reduce exploit opportunities, but they do not eliminate the underlying flaw.

Remediation

Patch, then assume compromise.

Upgrade Morse Micro HaLowLink 2 to version 2.11.13 or later. This is the first reported fixed version. The underlying fix should ensure strict validation of the S1G Capabilities IE length before copying and enforce bounds checking against the 15-byte destination buffer.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

ACTIVITY FEED

Recent activity

6 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

6 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity6

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-7762
NVD
nvd.nist.gov/vuln/detail/CVE-2026-7762
MITRE CWE · CWE-122
cwe.mitre.org
morsemicro.com
morsemicro.com/security-advisories/MM-SA-2026-002