CVE-2026-32705Public exploit

Driver crash via unbounded BST name length

Published Mar 13, 2026 · Updated Mar 13, 2026

Stack-based buffer overflow in PX4 Autopilot before 1.17.0-rc2 allows physically proximate attackers to crash the BST driver task. BST::probe uses the untrusted dev_name_len from an I2C device reply as an index into the 32-byte dev_name stack buffer before writing a null terminator. Exploitation requires control of a BST device or the I2C bus; successful memory corruption can also execute code in the driver context.

CVSS severity6.8
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in PX4 Autopilot before 1.17.0-rc2 allows physically proximate attackers to crash the BST driver task. BST::probe uses the untrusted dev_name_len from an I2C device reply as an index into the 32-byte dev_name stack buffer before writing a null terminator. Exploitation requires control of a BST device or the I2C bus; successful memory corruption can also execute code in the driver context.

The record

CVE
CVE-2026-32705
Published
Mar 13, 2026
Updated
Mar 13, 2026
Vendor
PX4
Product
PX4 Autopilot
Classifications
CWE-121
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 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=< 1.17.0-rc2

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

PX4 · PX4 Autopilotversion=< 1.17.0-rc2

Published CVSS scores

6.8GitHub, Inc.CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/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)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow

Public exploit references

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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