Improper Connection Request Handling in Zephyr RTOS by Zephyr Project
CVE-2025-12890

6.5MEDIUM

Key Information:

Vendor

Zephyrproject-rtos

Status
Zephyr
Vendor
CVE Published:
7 November 2025

What is CVE-2025-12890?

A vulnerability in Zephyr RTOS allows for improper handling of malformed connection requests. Specifically, when the interval is mistakenly set to 1—a value which is deemed illegal—and the chM is set to 0x7CFFFFFFFF, this leads to a crash. As a result, the peripheral will become non-connectable after such a malformed request is attempted. It is crucial to address this issue to maintain the integrity and availability of services reliant on the affected software.

Affected Version(s)

Zephyr * <= 4.1

References

https://github.com/zephyrproject-rtos/zephyr/security/adv...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2025-12890 : Improper Connection Request Handling in Zephyr RTOS by Zephyr Project