CVE-2021-26950

Local denial of service via out-of-bounds firmware read

Published Aug 18, 2022 · Updated May 5, 2025

An out-of-bounds read in Intel Wireless Bluetooth and Killer Bluetooth firmware before 22.120 allows authenticated users to cause denial of service locally. The firmware reads beyond a valid buffer boundary when processing local Bluetooth operations, producing an invalid memory access. Exploitation requires an authenticated local user and is limited to interrupting service; confidentiality and integrity impacts are not reported.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds read in Intel Wireless Bluetooth and Killer Bluetooth firmware before 22.120 allows authenticated users to cause denial of service locally. The firmware reads beyond a valid buffer boundary when processing local Bluetooth operations, producing an invalid memory access. Exploitation requires an authenticated local user and is limited to interrupting service; confidentiality and integrity impacts are not reported.

The record

CVE
CVE-2021-26950
Published
Aug 18, 2022
Updated
May 5, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 18, 2022CVE publishedPublication date reported by the CVE source.
  2. May 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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