e2fsprogs -- rehash.c/pass 3a mutate_name() code execution vulnerability

Lilith of Cisco Talos reports:

    A code execution vulnerability exists in the directory rehashing
    functionality of E2fsprogs e2fsck 1.45.4. A specially crafted ext4
    directory can cause an out-of-bounds write on the stack, resulting
    in code execution. An attacker can corrupt a partition to trigger
    this vulnerability.

Theodore Y. Ts’o reports:

    E2fsprogs 1.45.5 [...:] Fix a potential out of bounds write when
    checking a maliciously corrupted file system. This is probably not
    exploitable on 64-bit platforms, but may be exploitable on 32-bit
    binaries depending on how the compiler lays out the stack variables.
    (Addresses CVE-2019-5188)