Bug 2525414 (CVE-2026-80695)

Summary: CVE-2026-80695 kernel: hwmon: (sht3x) Fix unaligned accesses
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's hwmon (hardware monitoring) subsystem, specifically in the sht3x driver. This vulnerability occurs due to unaligned memory accesses when the driver processes 16-bit temperature and humidity values. A local attacker or a malicious device interacting with the driver could trigger this flaw. This can lead to a kernel panic on strict-alignment architectures, resulting in a denial of service (DoS).
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Description OSIDB Bzimport 2026-08-28 07:43:47 UTC 
In the Linux kernel, the following vulnerability has been resolved:

hwmon: (sht3x) Fix unaligned accesses

Sashiko reports:

In sht3x_update_client(), the 16-bit temperature and humidity values are
extracted from a stack-allocated byte array using be16_to_cpup(). The
pointers passed to this function are calculated as buf and buf + 3. Since
the difference between the two pointers is an odd number of bytes, at
least one of them is guaranteed to be at an unaligned offset.

This will trigger an alignment fault on strict-alignment architectures
such as ARMv5 or SPARC, resulting in a kernel panic.

Fix the problem by using get_unaligned_be16() instead of be16_to_cpup(),
and put_unaligned_be16() instead of cpu_to_be16().
Comment 1 gkamathe 2026-08-31 12:00:39 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026082804-CVE-2026-80695-5b92@gregkh/T