man-db 2.3.12 and 2.3.18 to 2.4.1 uses certain user-controlled DEFINE directives from the ~/.manpath file, even when running setuid, which could allow local users to gain privileges.
Exploitability
AV:LAC:LAu:NImpact
C:PI:PA:P4.6/AV:L/AC:L/Au:N/C:P/I:P/A:P