kernel: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare

A slab-out-of-bounds exists in the linux kernel in efivarfsdcompare, such that the issue can be triggered by parallel lookups using an invalid filename due to an incorrect memcmp function...

Linux Distros Unpatched Vulnerability : CVE-2025-39817

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - efivarfs: Fix slab-out-of-bounds in efivarfsdcompare Observed on kernel 6.6 present on master as well: BUG: KASAN: slab-out-of-bounds in memcmp+0x98/0xd0 Call...