CVE-2023-5563

HIGH

Zephyr < 3.4.0 - Denial of Service via SJA1000 CAN Controller Bus-Off Recovery

Title source: llm

Description

The SJA1000 CAN controller driver backend automatically attempt to recover from a bus-off event when built with CONFIG_CAN_AUTO_BUS_OFF_RECOVERY=y. This results in calling k_sleep() in IRQ context, causing a fatal exception.

References (1)

Core 1

Core References

Vendor Advisory

https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-98mc-rj7w-7rpv

Scores

CVSS v3 7.1

EPSS 0.0045

EPSS Percentile 35.5%

Attack Vector ADJACENT_NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-703

Status published

Products (1)

zephyrproject/zephyr < 3.4.0

Published Oct 13, 2023

Tracked Since Feb 18, 2026