# CVE-2026-98665: iio: health: max30102: fix NULL dereference in interrupt handler

CVE-2026-98665 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-98665, released October 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-98665
- Priority: Routine
- CVSS: 4.6 (Moderate)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 18, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98665

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.113-1 | [DEBIAN-CVE-2026-98665](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98665.md) | Oct 19, 2026 |
| Linux | linux Debian 14 | 7.2.10-1 | [DEBIAN-CVE-2026-98665](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98665.md) | Oct 19, 2026 |
| Linux | linux-6.12 Debian 12.15 (bookworm) | 6.12.113-1~deb12u1 | [DEBIAN-CVE-2026-98665](https://patchblox.com/security/data/fix/linux/debian-cve-2026-98665.md) | Oct 19, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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