TI-2026-39289 Aliases CVE-2026-54413 GHSA-36r7-c6f4-gj9g

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

MEDIUM 40CWE-125Published 2026-06-14 · Updated 2026-08-10

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: Low · None · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

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 potentially read memory past the receive buffer by sending a single-byte 0x27 SecurityAccess request that follows any earlier well-formed 0x27 message.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00407 35th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
driftregion	iso14229	up to 0.9.0	—	No fix listed	CNA

iso14229 Vendordriftregion Affected up to 0.9.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-54413
2026-10-03 Alias added: GHSA-36r7-c6f4-gj9g
2026-10-25 EPSS moved to the below the 50th percentile

References

Other 4

TI-2026-75063 Integer wraparound in iso14229 causes out-of-bounds read CVSS 4.0HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences