---
id: CVE-2026-0849
title: >-
  Malformed ATAES132A responses with an oversized length field overflow a
  52-byte stack buffer in the Zephyr crypto driver, allowing a compromised
  device or bus attacker to corrupt kernel memory and potentially hijack
  execution.
summary: >-
  Malformed ATAES132A responses with an oversized length field overflow a
  52-byte stack buffer in the Zephyr crypto driver, allowing a compromised
  device or bus attacker to corrupt kernel memory and potentially hijack
  execution.
severity: low
cvss: 3.8
cvssVector: 'CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-120
vendor: zephyrproject
product: zephyr
affected:
  - zephyr = 4.3.0
published: '2026-03-16'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:19:12.150'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-0849'
references:
  - url: >-
      https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-ff4p-3ggg-prp6
    label: vulnerabilities@zephyrproject.org
  - url: >-
      https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-ff4p-3ggg-prp6
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00244
epssPercentile: 0.15568
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-03-17T15:04:55.949281Z'
ingestedAt: '2026-10-15T22:48:25.564Z'
---

## Overview

Malformed ATAES132A responses with an oversized length field overflow a 52-byte stack buffer in the Zephyr crypto driver, allowing a compromised device or bus attacker to corrupt kernel memory and potentially hijack execution.

## Affected

- `zephyr = 4.3.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.