In libpixman in Pixman before 0.42.2, there is an out-of-bounds write (aka heap-based buffer overflow) in rasterize_edges_8 due to an integer overflow in pixman_sample_floor_y.
An integer overflow issue has been reported in the general_composite_rect() function in pixman prior to version 0.32.8. An attacker could exploit this issue to cause an application using pixman to crash or, potentially, execute arbitrary code.
Integer overflow in the create_bits function in pixman-bits-image.c in Pixman before 0.32.6 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via large height and stride values.