CVE-2026-98665: Linux Vulnerability

Description

In the Linux kernel, the following vulnerability has been resolved: iio: health: max30102: fix NULL dereference in interrupt handler The interrupt is requested in max30102_probe() and stays enabled for the lifetime of the device, but indio_dev->active_scan_mask is only valid while a buffer is enabled. When an interrupt arrives while no buffer is enabled, the handler dereferences the NULL active_scan_mask: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Call trace: __bitmap_weight+0x64/0x98 (P) max30102_interrupt_handler+0x48/0x160 [max30102] Call max30102_fifo_count() at the top of the handler and return early unless it reports a FIFO sample is ready. Because FIFO_RDY is the only interrupt source enabled in max30102_chip_init(), an invocation of max30102_interrupt_handler() without the FIFO_RDY interrupt status bit set carries no data to read and can return before touching active_scan_mask. A negative return from max30102_fifo_count() indicates a failed interrupt status read and is treated the same way.

Metrics

EPSS Probability

0.17%

5.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

Vendor	Product	Versions
Linux	Linux	>= 90579b69e94bf11ea0745ff003e82a6ce9725f96, < 2a74f30a7bb305cdc5c3e3e9239b32bb84f3529f; >= 90579b69e94bf11ea0745ff003e82a6ce9725f96, < eeb23ba97bd8016e815ef70300b8d34a0a316b90; >= 90579b69e94bf11ea0745ff003e82a6ce9725f96, < 60699102827fdb51f9591414165359c8e867f302; >= 90579b69e94bf11ea0745ff003e82a6ce9725f96, < 8d6f98972fe2bd6f73f39d982af0c85d766a1503; >= 90579b69e94bf11ea0745ff003e82a6ce9725f96, < f0ea4824deebf21dacfbe397c4b0a5fd3e745a8d
Linux	Linux	4.16

References

Timeline

Published: Oct 18, 2026
Last Modified: Oct 21, 2026
Status: Received

Frequently Asked Questions

What is CVE-2026-98665?

In the Linux kernel, the following vulnerability has been resolved: iio: health: max30102: fix NULL dereference in interrupt handler The interrupt is requested in max30102_probe() and stays enabled for the lifetime of the device, but indio_dev->active_scan_mask is only valid while a buffer is enabled. When an interrupt arrives while no buffer is enabled, the handler dereferences the NULL active_scan_mask: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Call trace: __bitmap_weight+0x64/0x98 (P) max30102_interrupt_handler+0x48/0x160 [max30102] Call max30102_fifo_count() at the top of the handler and return early unless it reports a FIFO sample is ready. Because FIFO_RDY is the only interrupt source enabled in max30102_chip_init(), an invocation of max30102_interrupt_handler() without the FIFO_RDY interrupt status bit set carries no data to read and can return before touching active_scan_mask. A negative return from max30102_fifo_count() indicates a failed interrupt status read and is treated the same way.

How severe is CVE-2026-98665?

Severity scoring for CVE-2026-98665 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.

How do I fix CVE-2026-98665?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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