Bug 2507152 (CVE-2026-64503)

Summary: CVE-2026-64503 kernel: iio: accel: kxsd9: fix runtime PM imbalance on write_raw() error
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's iio subsystem, specifically in the kxsd9 accelerometer driver. A local user could exploit this by requesting a scale with a non-zero integer part through the `kxsd9_write_raw()` function. This action causes a runtime Power Management (PM) usage-counter reference to leak, preventing the device from entering autosuspend mode. The consequence is increased power consumption and a denial of service for the device's power management capabilities.
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Description OSIDB Bzimport 2026-07-25 10:07:47 UTC 
In the Linux kernel, the following vulnerability has been resolved:

iio: accel: kxsd9: fix runtime PM imbalance on write_raw() error

kxsd9_write_raw() takes a runtime PM reference with pm_runtime_get_sync()
but returns -EINVAL directly when a scale with a non-zero integer part is
requested, skipping the matching pm_runtime_put_autosuspend(). This leaks
a runtime PM usage-counter reference on every such write, after which the
device can no longer autosuspend.

Set the error code and fall through to the existing put instead of
returning early.
Comment 1 TEJ RATHI 2026-07-29 15:18:48 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026072553-CVE-2026-64503-51c2@gregkh/T