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:
Call max30102_fifo_count() at the top of the handler and return early unless it reports a FIFO sample is ready.
Read full descriptionShow less
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.
Technical details traces, logs and code from the original report
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Call trace: __bitmap_weight+0x64/0x98 (P) max30102_interrupt_handler+0x48/0x160 [max30102]
CVSS
NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days
- 0.17 %
- Percentile among all scored CVEs
- 6
- Score date
- 10/20/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
References
Show 4 references
Raw JSON (NVD)
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{
"id": "CVE-2026-98665",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "90579b69e94bf11ea0745ff003e82a6ce9725f96",
"lessThan": "eeb23ba97bd8016e815ef70300b8d34a0a316b90",
"versionType": "git"
},
{
"status": "affected",
"version": "90579b69e94bf11ea0745ff003e82a6ce9725f96",
"lessThan": "60699102827fdb51f9591414165359c8e867f302",
"versionType": "git"
},
{
"status": "affected",
"version": "90579b69e94bf11ea0745ff003e82a6ce9725f96",
"lessThan": "8d6f98972fe2bd6f73f39d982af0c85d766a1503",
"versionType": "git"
},
{
"status": "affected",
"version": "90579b69e94bf11ea0745ff003e82a6ce9725f96",
"lessThan": "f0ea4824deebf21dacfbe397c4b0a5fd3e745a8d",
"versionType": "git"
}
],
"programFiles": [
"drivers/iio/health/max30102.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/iio/health/max30102.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-18T16:17:19.797",
"references": [
{
"url": "https://git.kernel.org/stable/c/60699102827fdb51f9591414165359c8e867f302",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8d6f98972fe2bd6f73f39d982af0c85d766a1503",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/eeb23ba97bd8016e815ef70300b8d34a0a316b90",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f0ea4824deebf21dacfbe397c4b0a5fd3e745a8d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: health: max30102: fix NULL dereference in interrupt handler\n\nThe interrupt is requested in max30102_probe() and stays enabled\nfor the lifetime of the device, but indio_dev->active_scan_mask is only\nvalid while a buffer is enabled. When an interrupt arrives while no\nbuffer is enabled, the handler dereferences the NULL active_scan_mask:\n\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n Call trace:\n __bitmap_weight+0x64/0x98 (P)\n max30102_interrupt_handler+0x48/0x160 [max30102]\n\nCall max30102_fifo_count() at the top of the handler and return early\nunless it reports a FIFO sample is ready. Because FIFO_RDY is the only\ninterrupt source enabled in max30102_chip_init(), an invocation of\nmax30102_interrupt_handler() without the FIFO_RDY interrupt status bit\nset carries no data to read and can return before touching\nactive_scan_mask. A negative return from max30102_fifo_count()\nindicates a failed interrupt status read and is treated the same way."
}
],
"lastModified": "2026-10-19T10:19:30.900",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}