CVE-2026-0849Public exploit

Kernel memory corruption via unchecked response length

Published Mar 14, 2026 · Updated Mar 14, 2026

Stack-based buffer overflow in the ATAES132A driver in Zephyr RTOS 4.3 and earlier allows physically proximate attackers to corrupt kernel memory. ataes132a_send_command copies count minus three response bytes into a 52-byte CCM stack buffer without bounding the copy to its capacity. A valid-CRC response with an inflated count requires control of the ATAES132A device or I2C bus and can crash the kernel or enable kernel-context code execution.

CVSS severity3.8
Low
EPSS probability0.24%
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 the ATAES132A driver in Zephyr RTOS 4.3 and earlier allows physically proximate attackers to corrupt kernel memory. ataes132a_send_command copies count minus three response bytes into a 52-byte CCM stack buffer without bounding the copy to its capacity. A valid-CRC response with an inflated count requires control of the ATAES132A device or I2C bus and can crash the kernel or enable kernel-context code execution.

The record

CVE
CVE-2026-0849
Published
Mar 14, 2026
Updated
Mar 14, 2026
Vendor
Zephyr Project
Product
Zephyr RTOS
Classifications
CWE-120
Attack vector
physical
Privileges
Unavailable

Timeline

How it unfolded

  1. Mar 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 14, 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=* <=4.3

What conditions does exploitation require?

Attack vectorphysical
Required privilegesUnavailable in this record.

What is affected?

Zephyr Project · Zephyr RTOSversion=* <=4.3

Published CVSS scores

6.8NVDCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.8Zephyr ProjectCVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic 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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