Buffer Overflow Affecting zephyrproject-rtos/zephyr package, versions [,4.3.0-rc1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-ZEPHYRPROJECTRTOSZEPHYR-14122804
- published27 Nov 2025
- disclosed26 Nov 2025
- creditPaschal Amusuo
Introduced: 26 Nov 2025
CVE-2025-9558 (opens in a new tab)How to fix?
Upgrade zephyrproject-rtos/zephyr to version 4.3.0-rc1 or higher.
Overview
Affected versions of this package are vulnerable to Buffer Overflow via the gen_prov_start function. An attacker can execute arbitrary code, cause a denial of service, or compromise data integrity by sending specially crafted data that exceeds the expected buffer size.