Bug 2467063 (CVE-2026-43160)

Summary: CVE-2026-43160 kernel: mfd: macsmc: Initialize mutex
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: unspecified    
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 macsmc driver. This vulnerability occurs because a mutex, a mechanism used to prevent simultaneous access to shared resources, within the `struct apple_smc` is not properly initialized in the `apple_smc_probe()` function. An uninitialized mutex can lead to occasional null pointer dereferences when `apple_smc_read()` is called. This can result in system instability or a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-05-06 13:02:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mfd: macsmc: Initialize mutex

Initialize struct apple_smc's mutex in apple_smc_probe(). Using the
mutex uninitialized surprisingly resulted only in occasional NULL
pointer dereferences in apple_smc_read() calls from the probe()
functions of sub devices.
Comment 1 Keith Grant 2026-05-06 19:18:43 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050631-CVE-2026-43160-163c@gregkh/T