CVE-2026-90137

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

platform/x86: hp-bioscfg: fix password encoding bounds check

The password PSWD_ENCODINGS parser reads password_obj[elem + pos_values]

while copying the supported password encodings from the ACPI package.

The outer loop only guarantees that elem is within password_obj_count.

The encoding count is bounded by MAX_ENCODINGS_SIZE, but that does not

guarantee that the ACPI package contains enough entries for all

elem + pos_values accesses.

A malformed package can therefore declare a non-zero encoding count

without providing enough string objects, causing the parser to read past

the ACPI package array and pass an out-of-bounds string pointer and

length to hp_convert_hexstr_to_str().

Add the same computed-index bounds check used by the other offset-based

package parsing loops before reading password_obj[elem + pos_values].

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References