libexif through 0.6.25 has a flaw in decoding MakerNotes. If the exif_mnote_data_get_value function gets passed in a 0 size, the passed in-buffer would be overwritten due to an integer underflow.
Exploitability
AV:LAC:HPR:NUI:NScope
S:UImpact
C:HI:HA:H7.4/CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HOther