Out-of-bounds Write Affecting zephyrproject-rtos/zephyr package, versions [0,4.2.2)[4.3.0-rc1, 4.4.0-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-15440484
- published8 Mar 2026
- disclosed5 Mar 2026
- credit0xkato
Introduced: 5 Mar 2026
CVE-2026-1678 (opens in a new tab)How to fix?
Upgrade zephyrproject-rtos/zephyr to version 4.2.2, 4.4.0-rc1 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write via the dns_unpack_name function. An attacker can execute arbitrary code or cause a denial of service by sending a specially crafted DNS response that triggers an out-of-bounds write. This is only exploitable if assertions are disabled and CONFIG_DNS_RESOLVER is enabled.