CVE-2026-17052 Zephyr Time-aware GPIO - Write-What-Where

Zephyr Time-aware GPIO (CONFIG_USERSPACE=y and CONFIG_TIMEAWARE_GPIO=y) contains a write-what-where vulnerability caused by missing K_SYSCALL_MEMORY_WRITE() checks in z_vrfy_tgpio_pin_read_ts_ec(), letting unprivileged users with device access write arbitrary kernel memory, exploit requires access to TGPIO device object.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.12% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Write-What-Where
Impact
Privilege Escalation, Denial Of Service, File System Write
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
21 September 2026
Updated
15 October 2026
Weakness
CWE-787

Vendor fix

Update to Zephyr version 4.4.0 or later where the missing memory write checks are added.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs