CVE-2023-5563 describes a critical vulnerability in the SJA1000 CAN controller driver backend within the Zephyr RTOS, specifically when CONFIG_CAN_AUTO_BUS_OFF_RECOVERY is enabled. This flaw allows the system to attempt bus-off recovery by calling k_sleep() in an interrupt context, leading to a fatal exception and denial of service. With a CVSS score of 7.5 (HIGH), this vulnerability is remotely exploitable with low attack complexity and no user interaction required, posing a significant availability risk. There is currently no public exploit code available, nor any evidence of active exploitation or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 3.4.0CPE matchmatch criteria | cpe:2.3:o:zephyrproject:zephyr:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
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