Bug 2467179 (CVE-2026-43221)

Summary: CVE-2026-43221 kernel: ipmi: ipmb: initialise event handler read bytes
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: unspecified Docs Contact:
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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Doc Text:
A flaw was found in the Linux kernel's Intelligent Platform Management Bus (IPMB) component. The IPMB event handler fails to initialize read bytes, which can lead to an uninitialized value being returned during an I2C (Inter-Integrated Circuit) read operation. This could allow a local attacker to obtain sensitive information from the system.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-06 13:08:57 UTC
In the Linux kernel, the following vulnerability has been resolved:

ipmi: ipmb: initialise event handler read bytes

IPMB doesn't use i2c reads, but the handler needs to set a value.
Otherwise an i2c read will return an uninitialised value from the bus
driver.