CVE-2026-43017

Kernel crash via truncated mesh advertising payload

Published May 1, 2026 · Updated May 1, 2026

An out-of-bounds read in the Bluetooth MGMT mesh path of Linux Kernel allows local users to crash the kernel with a truncated command. The mesh_send() handler checks only total command length and trusts adv_data_len, so its asynchronous path reads beyond a truncated queued buffer. Local access with permission to issue Bluetooth management commands is required; successful exploitation interrupts the entire host by crashing the kernel.

CVSS severity5.5
Medium
EPSS probability0.12%
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 the Bluetooth MGMT mesh path of Linux Kernel allows local users to crash the kernel with a truncated command. The mesh_send() handler checks only total command length and trusts adv_data_len, so its asynchronous path reads beyond a truncated queued buffer. Local access with permission to issue Bluetooth management commands is required; successful exploitation interrupts the entire host by crashing the kernel.

The record

CVE
CVE-2026-43017
Published
May 1, 2026
Updated
May 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1489
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2026CVE publishedPublication date reported by the CVE source.
  2. May 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.1
  2. Affected versionversion=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <0b706fb2294aff3adfd54653bda1b5e356ad4566
  3. Affected versionversion=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <244b639e6a3a8e26241e201004a3a9f764476631
  4. Affected versionversion=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <24fa32369cf15d8fc918bdfe94097b12e6acada0
  5. Affected versionversion=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <562ed1954f0c1bff3422b7b752bd3dacf185edbf
  6. Affected versionversion=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <bda93eec78cdbfe5cda00785cefebd443e56b88b
  7. Affected versionversion=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <edb5898cfa91afe7e8f83eda18d93034c953d632

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.1; version=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <0b706fb2294aff3adfd54653bda1b5e356ad4566; version=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <244b639e6a3a8e26241e201004a3a9f764476631; version=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <24fa32369cf15d8fc918bdfe94097b12e6acada0; version=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <562ed1954f0c1bff3422b7b752bd3dacf185edbf; version=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <bda93eec78cdbfe5cda00785cefebd443e56b88b; version=b338d91703fae6f6afd67f3f75caa3b8f36ddef3 <edb5898cfa91afe7e8f83eda18d93034c953d632

Published CVSS scores

5.5NIST NVDCVSS: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

T1489Service Stop

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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