Use After Free Affecting zephyrproject-rtos/zephyr package, versions [2.4.0,4.4.2-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-18507642
- published2 Aug 2026
- disclosed31 Jul 2026
- creditUnknown
Introduced: 31 Jul 2026
CVE-2026-10685 (opens in a new tab)How to fix?
Upgrade zephyrproject-rtos/zephyr to version 4.4.2-rc1 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free in the gatt_write_ccc_rsp process. An attacker can cause memory corruption, a crash, or potentially influence control flow by triggering a specific sequence where a GATT server peer responds to a CCC write with an ATT Error Response, leading to a use-after-free scenario in applications that free or recycle subscription parameters in their notification-termination handler.