Description of the patch:
This update for libpng12 fixes the following issues:
png_do_quantize via
malformed palette index (bsc#1254157)1.2.57-150000.4.3.11.2.57-150000.4.3.11.2.57-150000.4.3.11.2.57-150000.4.3.11.2.57-150000.4.3.11.2.57-150000.4.3.1Exploitability
AV:LAC:LPR:NUI:NScope
S:UImpact
C:LI:NA:H6.8/CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H