Bug 2532430 (CVE-2026-81017)

Summary: CVE-2026-81017 kernel: platform/chrome: sensorhub: Bound the EC-reported sensor number
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's `sensorhub` component. A local attacker could provide a maliciously crafted sensor number in an EC FIFO event. This unchecked sensor number could lead to an out-of-bounds read and write in the `batch_state` array, potentially causing memory corruption or system instability.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-11 22:59:11 UTC 
In the Linux kernel, the following vulnerability has been resolved:

platform/chrome: sensorhub: Bound the EC-reported sensor number

Each EC FIFO event carries an 8-bit sensor number (in->sensor_num).
cros_ec_sensorhub_ring_handler() validates the FIFO event count, the
per-read count and the ring bound, but not the sensor number, which
cros_ec_sensor_ring_process_event() then uses unchecked to index
sensorhub->batch_state[] - allocated with only sensorhub->sensor_num
entries. A sensor number of sensor_num or larger is an out-of-bounds
read and write of batch_state[].

Validate the sensor number in the ring handler, where each event is read
from the EC, and drop a malformed event before it is used.
Comment 1 Keith Grant 2026-09-14 21:10:14 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-81017.mbox