Bug 2429597 (CVE-2025-71115)

Summary: CVE-2025-71115 kernel: um: init cpu_tasks[] earlier
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2026-01-14 16:03:20 UTC 
In the Linux kernel, the following vulnerability has been resolved:

um: init cpu_tasks[] earlier

This is currently done in uml_finishsetup(), but e.g. with
KCOV enabled we'll crash because some init code can call
into e.g. memparse(), which has coverage annotations, and
then the checks in check_kcov_mode() crash because current
is NULL.

Simply initialize the cpu_tasks[] array statically, which
fixes the crash. For the later SMP work, it seems to have
not really caused any problems yet, but initialize all of
the entries anyway.
Comment 1 Jon Moroney 2026-01-14 19:50:55 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026011414-CVE-2025-71115-7c28@gregkh/T