CVE-2026-19669 Zephyr Fuel Gauge - Buffer Overflow

Zephyr drivers/fuel_gauge contains a buffer overflow caused by unvalidated variable-length arrays sized by attacker-controlled len in syscall verifiers, letting user-mode attackers with device access execute kernel code or crash the system, exploit requires user-mode access with CONFIG_USERSPACE enabled and fuel-gauge device permissions.

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
Buffer Overflow
Impact
Remote Code Execution, Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
11 October 2026
Updated
15 October 2026
Weakness
CWE-787

Vendor fix

Update to the fixed version where kernel-side copies are removed and caller arrays are validated with K_SYSCALL_MEMORY_ARRAY_READ/WRITE.

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

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