---
id: CVE-2026-0849
title: 'crypto: ATAES132A response length allows stack buffer overflow'
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'
cvssSource: cna
cwe:
  - CWE-120
vendor: zephyrproject-rtos
product: Zephyr
affected:
  - Zephyr < 4.4.0
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-03-17T15:04:55.949281Z'
exploitAvailable: true
published: '2026-03-14'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:09:57.963Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-0849'
references:
  - url: >-
      https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-ff4p-3ggg-prp6
tags:
  - cve.org
  - exploit-available
epss: 0.00244
epssPercentile: 0.14548
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 < 4.4.0`

## Remediation

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