Write-what-where Condition Affecting zephyrproject-rtos/zephyr package, versions [,4.2.0-rc2)
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-12946169
- published22 Sept 2025
- disclosed19 Sept 2025
- creditUnknown
Introduced: 19 Sep 2025
NewCVE-2025-7403 (opens in a new tab)How to fix?
Upgrade zephyrproject-rtos/zephyr to version 4.2.0-rc2 or higher.
Overview
Affected versions of this package are vulnerable to Write-what-where Condition via the bt_conn_tx_processor function. An attacker can achieve precise memory corruption by triggering a use-after-free condition that allows writing attacker-controlled data before memory is zeroed.