Bluetooth: Mesh: Out-of-Bound Write in gen_prov_start

published 2025-11-26 11 mo ago modified 2026-10-13 26 d ago also EUVD-2025-199712

cvss: 7.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits: 0; none known

There is a potential OOB Write vulnerability in the gen_prov_start function in pb_adv.c. The full length of the received data is copied into the link.rx.buf receiver buffer without any validation on the data size.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 11 mo ago (2025-11-26)

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.6	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Affected products

zephyrproject-rtos Zephyr

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input

References

github.com /zephyrproject-rtos/zephyr/security/advisories/GHSA-8wvr-688x-68vr

Sources

CVE List CVE-2025-9558
NVD CVE-2025-9558

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