Bug 2429058 (CVE-2025-71101)

Summary: CVE-2025-71101 kernel: platform/x86: hp-bioscfg: Fix out-of-bounds array access in ACPI package parsing
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 2026-01-13 16:03:44 UTC 
In the Linux kernel, the following vulnerability has been resolved:

platform/x86: hp-bioscfg: Fix out-of-bounds array access in ACPI package parsing

The hp_populate_*_elements_from_package() functions in the hp-bioscfg
driver contain out-of-bounds array access vulnerabilities.

These functions parse ACPI packages into internal data structures using
a for loop with index variable 'elem' that iterates through
enum_obj/integer_obj/order_obj/password_obj/string_obj arrays.

When processing multi-element fields like PREREQUISITES and
ENUM_POSSIBLE_VALUES, these functions read multiple consecutive array
elements using expressions like 'enum_obj[elem + reqs]' and
'enum_obj[elem + pos_values]' within nested loops.

The bug is that the bounds check only validated elem, but did not consider
the additional offset when accessing elem + reqs or elem + pos_values.

The fix changes the bounds check to validate the actual accessed index.
Comment 1 Jon Moroney 2026-01-15 02:58:28 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026011345-CVE-2025-71101-1886@gregkh/T