What is CVE-2026-10643?

CVE-2026-10643 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Write. CVSS score: 8.7/10. Published 2026-06-28.

How severe is CVE-2026-10643?

High severity. CVSS v3 base score is 8.7 out of 10.

Buffer overflow in Zephyrproject Zephyr

CVE-2026-10643

Zephyr's IP socket recvmsg() implementation (subsys/net/lib/sockets/sockets_inet.c, insert_pktinfo()) validated the user-supplied ancillary (msg_control) buffer using only the payload length (msg-msg_controllen < pktinfo_len) before writin…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H.

Affected products

Zephyrproject Zephyr — versions 3.6.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

vulnerabilities@zephyrproject.org (patch)

Frequently asked questions

What is CVE-2026-10643?: CVE-2026-10643 is a high-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Write. CVSS score: 8.7/10. Published 2026-06-28.
How severe is CVE-2026-10643?: High severity. CVSS v3 base score is 8.7 out of 10.