bt: hci: DoS and possible RCE

published 2023-11-21 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-54286

cvss: 8.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits: 0; none known

An malicious BLE device can cause buffer overflow by sending malformed advertising packet BLE device using Zephyr OS, leading to DoS or potential RCE on the victim BLE device.

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.3	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

zephyrproject-rtos Zephyr

Classification

Weakness

CWE-190 Integer Overflow or Wraparound
CWE-120 Buffer Copy without Checking Size of Input

References

github.com /zephyrproject-rtos/zephyr/security/advisories/GHSA-j4qm-xgpf-qjw3
third-party-advisory

Sources

CVE List CVE-2023-4424
NVD CVE-2023-4424

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary