High severity · published Nov 26, 2025
CVE-2025-9558
Bluetooth: Mesh: Out-of-Bound Write in gen_prov_start
7.6
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZE
Zephyr · zephyrproject-rtos
before 4.2.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-9558
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-9558
github.com
https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8wvr-688x-68vr
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