What is CVE-2026-9263?

CVE-2026-9263 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-06-30.

How severe is CVE-2026-9263?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Out-of-bounds Read in Zephyrproject Zephyr

CVE-2026-9263

The Zephyr Bluetooth controller ISO Adaptation Layer (subsys/bluetooth/controller/ll_sw/isoal.c) fails to validate the length field of a framed ISO PDU start segment. Per the Bluetooth specification a start segment (sc=0) always carries a…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Zephyrproject Zephyr — versions 3.3.0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

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

Frequently asked questions

What is CVE-2026-9263?: CVE-2026-9263 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-06-30.
How severe is CVE-2026-9263?: Medium severity. CVSS v3 base score is 6.5 out of 10.