What is CVE-2026-10645?

CVE-2026-10645 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Read. CVSS score: 4.9/10. Published 2026-06-23.

How severe is CVE-2026-10645?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Out-of-bounds Read in Zephyrproject Zephyr

CVE-2026-10645

The Zephyr ext2 filesystem driver (subsys/fs/ext2) trusted the on-disk directory entry fields de_rec_len and de_name_len when walking a directory block. ext2_fetch_direntry() guarded only with de_name_len > EXT2_MAX_FILE_NAME, but de_name_…

Vulnerability class: Buffer Overflow

EPSS: 0.002 (4.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.

Affected products

Zephyrproject Zephyr — versions 3.5.0
Zephyrproject-rtos Zephyr

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

vulnerabilities@zephyrproject.org (Exploit, Patch, Vendor Advisory)
vulnerabilities@zephyrproject.org (patch)

Frequently asked questions

What is CVE-2026-10645?: CVE-2026-10645 is a medium-severity vulnerability in Zephyrproject Zephyr, classified under Out-of-bounds Read. CVSS score: 4.9/10. Published 2026-06-23.
How severe is CVE-2026-10645?: Medium severity. CVSS v3 base score is 4.9 out of 10.