Out-of-Bound Write Vulnerability in Zephyr RTOS by Zephyr Project
CVE-2025-9557

7.6HIGH

Key Information:

Vendor

Zephyrproject-rtos

Status
Zephyr
Vendor
CVE Published:
26 November 2025

What is CVE-2025-9557?

An out-of-bound write vulnerability in Zephyr RTOS may allow attackers to execute arbitrary code. This flaw can affect systems even if they have some form of memory protection in place, leading to potential crashes and a denial of service. It is crucial for users and system administrators to assess their current versions and apply patches to mitigate any risks associated with this vulnerability.

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Deploy the Patch

Affected Version(s)

Zephyr * <= 4.2

References

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

CVSS V3.1

Score:
7.6
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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