iso14229 Integer Underflow and Out-of-Bounds Read in Handle_0x27_SecurityAccess() (CVE-2026-54413) | HOL Guard CVE

High · CVSS 8.2CVE-2026-54413

iso14229 Integer Underflow and Out-of-Bounds Read in Handle_0x27_SecurityAccess()

Answer in brief

CVE-2026-54413 records a High severity (CVSS 8.2) vulnerability in iso14229 Integer Underflow and Out-of-Bounds Read in Handle_0x27_SecurityAccess(). The current sources do not mark it as known exploited. The current feed maps driftregion/iso14229 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 14, 2026Updated Aug 10, 2026Source checked Sep 20, 2026First seen by HOL Aug 5, 2026Material review Aug 10, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.2
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps driftregion/iso14229 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
driftregion/iso14229generic	0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for driftregion/iso14229.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Jun 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.