zephyrproject-rtos Zephyr up to 4.2 Bluetooth Host Stack bt_br_acl_recv integer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in zephyrproject-rtos Zephyr up to 4.2 and classified as critical. The affected element is the function bt_br_acl_recv of the component Bluetooth Host Stack. Performing a manipulation results in integer overflow. This vulnerability is reported as CVE-2025-12035. The attacker must have access to the local network to execute the attack. No exploit exists.

Detailsinfo

A vulnerability was found in zephyrproject-rtos Zephyr up to 4.2. It has been classified as critical. This affects the function bt_br_acl_recv of the component Bluetooth Host Stack. The manipulation with an unknown input leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on availability. The summary by CVE is:

An integer overflow condition exists in Bluetooth Host stack, within the bt_br_acl_recv routine a critical path for processing inbound BR/EDR L2CAP traffic.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2025-12035 since 10/21/2025. The exploitability is told to be easy. The attack needs to be done within the local network. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/15/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 6.5
VulDB Temp Score: 6.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (zephyr): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/21/2025 CVE reserved
12/15/2025 +55 days Advisory disclosed
12/15/2025 +0 days VulDB entry created
12/15/2025 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-p793-3456-h7w3
Status: Confirmed

CVE: CVE-2025-12035 (🔒)
GCVE (CVE): GCVE-0-2025-12035
GCVE (VulDB): GCVE-100-336507

Entryinfo

Created: 12/15/2025 21:33
Changes: 12/15/2025 21:33 (64)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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