What is CVE-2023-1901?

CVE-2023-1901 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Write. CVSS score: 5.9/10. Published 2023-07-10.

How severe is CVE-2023-1901?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Buffer overflow in Zephyrproject Zephyr

CVE-2023-1901

The bluetooth HCI host layer logic not clearing a global reference to a semaphore after synchronously sending HCI commands may allow a malicious HCI Controller to cause the use of a dangling reference in the host layer, leading to a crash (DoS) or potential RCE on the Host layer.

Vulnerability class: Buffer Overflow

EPSS: 0.006 (45.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H.

Affected products

Zephyrproject Zephyr
Zephyrproject-rtos Zephyr

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write
CWE-672 — Operation on a Resource after Expiration or Release

References

vulnerabilities@zephyrproject.org (Vendor Advisory)

Frequently asked questions

What is CVE-2023-1901?: CVE-2023-1901 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Write. CVSS score: 5.9/10. Published 2023-07-10.
How severe is CVE-2023-1901?: Medium severity. CVSS v3 base score is 5.9 out of 10.