ImageMagick before 7.1.2-26 and 6.9.13-51 contains a memory leak in color transformation to the log colorspace: when the operation fails, a small amount of memory is not released.
Exploitability
AV:LAC:HAT:PPR:NUI:NVulnerable System
VC:NVI:NVA:LSubsequent System
SC:NSI:NSA:N2.1/CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NResource Management