Critical

Heap-based buffer overflow in Morse Micro HaLowLink 2 morse.ko TIM beacon parsing

IdentifiersCVE-2026-7763CWE-122

CVE-2026-7763 is a heap-based buffer overflow in the morse.ko HaLow Wi-Fi kernel driver shipped with Morse Micro HaLowLink 2 versions prior to 2.11.13. The flaw is in morse_page_slicing_process_tim_element() in page_slicing.c while parsing the Traffic Indication Map (TIM) Information Element from received 802.11ah beacon frames. The driver derives the TIM bitmap length directly from attacker-controlled IE data and does not validate that length against the fixed-size destination buffer before invoking memset and memcpy. As a result, a crafted beacon can cause up to 252 bytes of out-of-bounds heap overwrite with attacker-controlled data. Because beacon frames are broadcast and processed during passive scanning, 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 is heap-based and attacker-controlled data is written beyond the destination buffer in kernel context, the vulnerability may also permit remote code execution, subject to target-specific memory layout and exploitability conditions. The attack can be launched by an unauthenticated adversary within 802.11ah radio range.

Mitigation

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

If immediate patching is not possible, reduce exposure by disabling or limiting affected HaLow Wi-Fi functionality where operationally feasible, avoiding operation in untrusted or hostile radio environments, and monitoring for anomalous or malformed 802.11ah beacon activity. Since exploitation occurs through passive processing of broadcast beacons, network-layer controls alone may be insufficient once the radio interface is exposed.

Remediation

Patch, then assume compromise.

Upgrade Morse Micro HaLowLink 2 to version 2.11.13 or later, which addresses the vulnerable TIM Information Element parsing in the morse.ko driver. Ensure all affected devices and firmware/software bundles using vulnerable HaLowLink 2 releases are updated.

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.

What this page doesn’t show

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

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-2026-7763

NVD

nvd.nist.gov/vuln/detail/CVE-2026-7763

MITRE CWE · CWE-122

cwe.mitre.org

morsemicro.com

morsemicro.com/security-advisories/MM-SA-2026-001