Bug 2467058 (CVE-2026-43148)

Summary: CVE-2026-43148 kernel: powerpc/smp: Add check for kcalloc() failure in parse_thread_groups()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Priority: low    
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. This vulnerability occurs in the `powerpc/smp` component due to a missing check for memory allocation failure. Specifically, if the `kcalloc()` function fails to allocate memory within `parse_thread_groups()`, a subsequent operation can attempt to use a NULL pointer. This can lead to a system crash, resulting in a denial of service.
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Description OSIDB Bzimport 2026-05-06 13:02:01 UTC 
In the Linux kernel, the following vulnerability has been resolved:

powerpc/smp: Add check for kcalloc() failure in parse_thread_groups()

As kcalloc() may fail, check its return value to avoid a NULL pointer
dereference when passing it to of_property_read_u32_array().
Comment 1 Keith Grant 2026-05-06 18:46:31 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050627-CVE-2026-43148-224c@gregkh/T