Out-of-bounds read in morse.ko Vendor IE processing

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Summary

CVECVE-2026-7764
StatePUBLISHED
AssignerBugcrowd
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-04 02:16:17 UTC
Updated2026-06-04 15:16:58 UTC
DescriptionAn out-of-bounds read vulnerability in the morse.ko HaLow Wi-Fi kernel driver in Morse Micro HaLowLink 2 software versions prior to 2.11.12 allows an unauthenticated attacker within radio range to disclose a small amount of kernel heap memory or cause a Denial of Service (kernel oops/panic) via a crafted 802.11ah beacon or probe response frame containing a malformed Vendor Information Element. The function morse_vendor_find_vendor_ie() does not validate the IE length against the expected structure size before its result is passed to morse_vendor_rx_caps_ops_ie() and morse_vendor_fill_sta_vendor_info(), which read at fixed offsets into the IE data. Because the length check only requires the IE to be longer than 3 bytes, an attacker can supply an undersized IE, causing a heap out-of-bounds read of up to 9 bytes. No authentication, association, or user interaction is required.

Risk And Classification

Primary CVSS: v3.1 6.8 MEDIUM from ADP

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

EPSS: 0.000160000 probability, percentile 0.040040000 (date 2026-06-05)

Problem Types: CWE-125: Out-of-bounds Read

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED6.8MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.8MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Morse Micro HaLowLink 2 affected 2.11.12 semver Not specified

References

ReferenceSourceLinkTags
www.morsemicro.com/security-advisories/MM-SA-2026-003 4ac701fe-44e9-4bcd-9585-dd6449257611 www.morsemicro.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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