CVE-2026-98665 iio: health: max30102: fix NULL dereference in interrupt handler
A NULL pointer dereference in the Linux kernel max30102 driver can cause a system crash when an interrupt occurs without an active buffer.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98665?
CVE-2026-98665 is a vulnerability in Linux, published on 18 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-98665?
How do I fix CVE-2026-98665?
Apply the vendor's patch.
Is CVE-2026-98665 being exploited?
There is no known exploitation of CVE-2026-98665 in the wild and no public exploit code.
Sources
Also known as AZL-108957, BELL-CVE-2026-98665, DEBIAN-CVE-2026-98665, GHSA-g7xj-pf5g-99j9, UBUNTU-CVE-2026-98665.