A heap use-after-free vulnerability exists in the libblkid library of util-linux during nested partition probing. This flaw occurs because certain partition probers cache raw pointers that become stale after array reallocations, leading to potential memory corruption. An attacker can exploit this by presenting a crafted block device image, triggering the flaw automatically via udev/udisks without user interaction. The impact includes limited information disclosure or denial of service. Red Hat has released patches to address this issue in their util-linux packages.