iio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF
In the Linux kernel, the following vulnerability has been resolved: iio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF The atlas driver requests its hardware data-ready IRQ with devm_request_threaded_irq(); its threaded handler queues an irq_work, atlas_work_handler(), that calls iio_trigger_poll(data->trig). The IRQ is devm-managed, so free_irq() runs from the devres unwind after atlas_remove() returns without flushing that irq_work. Once a buffer is enabled, conversion-complete IRQs keep firing and queueing it; a pending irq_work can therefore run after the unwind has freed atlas_data/indio_dev and the trigger, when atlas_work_handler() derives the atlas_data pointer via container_of() and dereferences data->trig, a use-after-free. Call iio_trigger_poll_nested() directly from the threaded handler instead of bouncing through irq_work. free_irq() then drains the threaded handler, closing the window; other iio drivers with a threaded data-ready IRQ do the same (e.g. bmi270). This issue was found by an in-house static analysis tool.
CVE-2026-89938
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89938
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
"lessThan": "f64b437641b5a70c18bb0fd38da2b69d8926c871",
"versionType": "git"
},
{
"status": "affected",
"version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
"lessThan": "91e12b0fbd7047d02bf4ef4dbc491b9ef0159250",
"versionType": "git"
},
{
"status": "affected",
"version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
"lessThan": "2071624c3d0f497ca91da78858e6f30d7112fea6",
"versionType": "git"
},
{
"status": "affected",
"version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
"lessThan": "30b0d44c978bbc857bd68b71dab371805653de70",
"versionType": "git"
},
{
"status": "affected",
"version": "7103b99b031cb0ff6979331757bfc4893f37ae9e",
"lessThan": "be61c8c6252671ecf1fee0ad90f87669e0be1e20",
"versionType": "git"
}
],
"programFiles": [
"drivers/iio/chemical/atlas-sensor.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/iio/chemical/atlas-sensor.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89938
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #36379 · Revision 1
- Added to Heist Feed
- Publisher date