---
id: CVE-2026-54413
title: >-
  driftregion iso14229 through 0.9.0 contains an integer underflow and
  downstream out-of-bounds read in the Handle_0x27_SecurityAccess function in
  iso14229.c that allows a remote unauthenticated attacker to crash a UDS server
  and potential…
summary: >-
  driftregion iso14229 through 0.9.0 contains an integer underflow and
  downstream out-of-bounds read in the Handle_0x27_SecurityAccess function in
  iso14229.c that allows a remote unauthenticated attacker to crash a UDS server
  and potential…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H'
cwe:
  - CWE-125
  - CWE-191
published: '2026-06-14'
updated: '2026-08-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-54413'
references:
  - url: 'https://cwe.mitre.org/data/definitions/125.html'
    label: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
  - url: 'https://cwe.mitre.org/data/definitions/191.html'
    label: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
  - url: 'https://github.com/driftregion/iso14229'
    label: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
  - url: 'https://github.com/driftregion/iso14229/blob/main/iso14229.c#L1447'
    label: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
tags:
  - nvd
epss: 0.00717
epssPercentile: 0.51821
ingestedAt: '2026-08-10T12:39:46.840Z'
---

## Overview

driftregion iso14229 through 0.9.0 contains an integer underflow and downstream out-of-bounds read in the Handle_0x27_SecurityAccess function in iso14229.c that allows a remote unauthenticated attacker to crash a UDS server and potentially read memory past the receive buffer by sending a single-byte 0x27 SecurityAccess request that follows any earlier well-formed 0x27 message.

## Remediation

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