Vulnerability · CVE-2025-12035
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.
Published Dec 15, 2025 · catalog updated Oct 13, 2026 · Zephyr
Last checked Nov 4, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-12035. EPSS is 0.20%. Act only if a listed version of Zephyr is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2026-4179 · Medium
- CVE-2026-0849 · Medium
- CVE-2026-1678 · Critical
- CVE-2025-12899 · Medium
- CVE-2025-9557 · High
- Severity
- Medium6.5
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.20%
- Remediation
- Version ranges on file
- Affected products
- vendor zephyrproject-rtos Zephyr * <4.3.0
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor zephyrproject-rtos Zephyr * <4.3.0* <4.3.0
How to fix CVE-2025-12035
Upgrade
CVE-2025-12035 lists a fix boundary at 4.3.0. Compare the installed build with that boundary before you change production.
Version check
Seen in * <4.3.0
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-12035. EPSS is 0.20%. Act only if a listed version of Zephyr is installed.
Which versions are affected?
Compare what you have installed with zephyrproject-rtos Zephyr * <4.3.0 * <4.3.0. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.20%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Dec 15, 2025 · EUVD
Detected
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.
Oct 13, 2026 · EUVD
Updated
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.
Sources
- CVE.orgVulnerability recordCVE-2025-12035
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-12035
30-day exploitation probability 0.20%
first.org - EUVDVulnerability recordEUVD-2025-203444
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.
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSNov 4, 2026
- EUVDOct 28, 2026
- CVE.orgOct 26, 2026