CVE-2026-1678 - Vulnerability Analysis

Overview

A DNS resolver with CONFIG_DNS_RESOLVER enabled contains a buffer overflow caused by incorrect buffer tailroom caching in dns_unpack_name(), letting attackers trigger out-of-bounds write via malicious DNS response, exploit requires crafted DNS response.

Severity & Score

Impact

Attackers can cause out-of-bounds write, potentially leading to memory corruption or denial of service.

Mitigation

Update to the latest version with the fix for buffer tailroom caching issue.

References

• https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-536f-h63g-hj42

Related Resources

• Vulnerability Intelligence Dashboard
• Credential Scanner