EUVD-2026-58079
GHSA-pmcm-gw2w-hpxf
Severity by source
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Adjacent Bluetooth vector, no auth or interaction required; impact is confidentiality-only from memory over-read, with no integrity or availability effect.
Primary rating from Vendor (Silabs).
CVSS VectorVendor: Silabs
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
1DescriptionCVE.org
A malformed Bluetooth connection request message can cause the BT122 to leak potentially sensitive information. See vulnerability B-E4 in the related paper below.
AnalysisAI
Memory disclosure in the Silicon Labs BT122 Bluetooth module allows unauthenticated adjacent attackers to leak potentially sensitive device memory by sending a malformed Bluetooth connection request. The root cause is a buffer over-read (CWE-126) in the firmware's connection request parser, identified as finding B-E4 in academic research published on arXiv (2409.02905). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to be within Bluetooth radio range of the BT122 device (adjacent network vector, AV:A) - typically 10-100 meters depending on Bluetooth power class. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 5.3 with AV:A accurately reflects the primary risk constraint: exploitation requires physical proximity within Bluetooth radio range, typically 10-100 meters depending on device class. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with a Bluetooth-capable laptop or single-board computer positions themselves within radio range of a deployed BT122 module and transmits a specially crafted malformed connection request packet using standard Bluetooth tooling. The BT122 firmware's parser reads beyond its intended buffer boundary and returns memory contents in its response, which the attacker captures. … |
| Remediation | Consult the Silicon Labs advisory at https://community.silabs.com/068Vm00000x0Yqy for firmware update guidance; a patch is available per the vendor advisory, but an exact patched firmware version number has not been independently confirmed in the available data - treat any version cited in the advisory as authoritative. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Denial of service in the Silicon Labs BT122 Bluetooth module is triggered by an adjacent unauthenticated attacker who tr
Denial of service in the Silicon Labs BT122 Bluetooth module allows any adjacent attacker to permanently stop the module
Same weakness CWE-126 – Buffer Over-read
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today