CVE-2026-54413

high

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.

References

https://github.com/driftregion/iso14229/blob/main/iso14229.c#L1447

https://github.com/driftregion/iso14229

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-36664

https://cwe.mitre.org/data/definitions/191.html

https://cwe.mitre.org/data/definitions/125.html

Details

Source: Mitre, NVD

Published: 2026-06-14

Updated: 2026-08-10

Risk Information

CVSS v2

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:C

Severity: High

CVSS v3

Base Score: 8.2

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Severity: High

CVSS v4

Base Score: 8.8

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00407