Bug 2468101 (CVE-2026-43307)

Summary: CVE-2026-43307 kernel: iio: accel: adxl380: Avoid reading more entries than present in FIFO
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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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: accel: adxl380` driver. The driver's interrupt handler, responsible for reading data from the sensor's FIFO (First-In, First-Out) buffer, can miscalculate the number of entries. This error may cause the driver to attempt to read beyond the actual data present in the buffer. Such an out-of-bounds read can lead to system instability or a crash, resulting in a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-05-08 14:04:32 UTC 
In the Linux kernel, the following vulnerability has been resolved:

iio: accel: adxl380: Avoid reading more entries than present in FIFO

The interrupt handler reads FIFO entries in batches of N samples, where N
is the number of scan elements that have been enabled. However, the sensor
fills the FIFO one sample at a time, even when more than one channel is
enabled. Therefore,the number of entries reported by the FIFO status
registers may not be a multiple of N; if this number is not a multiple, the
number of entries read from the FIFO may exceed the number of entries
actually present.

To fix the above issue, round down the number of FIFO entries read from the
status registers so that it is always a multiple of N.
Comment 1 Keith Grant 2026-05-08 18:50:34 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050858-CVE-2026-43307-5b3e@gregkh/T