CVE-2026-80593hwmon: (asus_atk0110) Check package count before accessing element

Official description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (asus_atk0110) Check package count before accessing element atk_ec_present() walks the management group package returned by the GGRP ACPI method and, for each sub-package, reads its first element: id = &obj->package.elements[0]; if (id->type != ACPI_TYPE_INTEGER) without checking that the sub-package is non-empty. ACPICA allocates the element array with exactly package.count entries, so for a sub-package with a zero count this reads past the allocation. The sibling function atk_debugfs_ggrp_open() performs the same access but skips empty packages with a package.count check first. Add the same check to atk_ec_present() so a malformed firmware package cannot trigger an out-of-bounds read.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/2a137124664aad1e36d8d74e8e2207365a04737f
• https://git.kernel.org/stable/c/459b0a0439ea65b2b612aa572eb62a2e26d05618
• https://git.kernel.org/stable/c/768f20e7bb48d723b82cb142120263d0806fbeb8
• https://git.kernel.org/stable/c/76392d35c8df471b288cfc6536bd092b3c8ee2cf
• https://git.kernel.org/stable/c/981a8a2e3773dc7e704943388a1fb97970b23275
• https://git.kernel.org/stable/c/d8d4fa0c4f818e30b6f6737bdd989b7e2b511cae
• https://git.kernel.org/stable/c/b770fcfcdced569bcf7c6982aeea8c3d11a21c2b
• https://git.kernel.org/stable/c/e2735b39f044bad7bf2017aef248935525bc0b97