SB2026072751 - Heap-based buffer overflow in Linux kernel iio adc driver

Description

This security bulletin contains information about 1 vulnerability.

1) Heap-based buffer overflow (CVE-ID: CVE-2026-64502)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to corrupt the heap and cause a denial of service.

The vulnerability exists due to a heap-based buffer overflow in ad_sigma_delta_clear_pending_event() when handling pending events with num_resetclks set to 0. A local user can trigger the pending-event drain path to corrupt the heap and cause a denial of service.

The issue can occur for registerless devices without an RDY GPIO and also for devices with an RDY GPIO set when the pending event condition is detected.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/3394e0b3328422431cadaf314fa58d3717ed4936
• https://git.kernel.org/stable/c/3bceb26dfaf7ba805b459e41c1d0ba916862dade
• https://git.kernel.org/stable/c/91bc6767a4f55dc470d8a56b55b9f2ea09094efe