What is CVE-2026-10652?

CVE-2026-10652 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Read. CVSS score: 4.8/10. Published 2026-06-30.

How severe is CVE-2026-10652?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Out-of-bounds Read in Zephyrproject Zephyr

CVE-2026-10652

Zephyr's DNS resolver (subsys/net/lib/dns) parses resource records from DNS responses in dns_unpack_answer(), which validated only the fixed RR header (type, class, TTL, rdlength) and accepted any attacker-declared rdlength, including one…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L.

Affected products

Zephyrproject Zephyr — versions 4.3.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

vulnerabilities@zephyrproject.org (patch)
vulnerabilities@zephyrproject.org

Frequently asked questions

What is CVE-2026-10652?: CVE-2026-10652 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Read. CVSS score: 4.8/10. Published 2026-06-30.
How severe is CVE-2026-10652?: Medium severity. CVSS v3 base score is 4.8 out of 10.