pixman: Integer overflow in pixman_sample_floor_y leading to heap out-of-bounds write

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.

pixman: integer overflow in create_bits function

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.

xorg-x11-server: integer underflow when handling trapezoids

Integer underflow in the xTrapezoidValid macro in render/picture.h in X.Org allows context-dependent attackers to cause a denial of service (crash) via a negative bottom value.

pixman: integer underflow when handling trapezoids

Integer underflow in the pixman_trapezoid_valid macro in pixman.h in Pixman before 0.32.0, as used in X.Org server and cairo, allows context-dependent attackers to cause a denial of service (crash) via a negative bottom value.

stress-test master commit e4c878 was discovered to contain a FPE vulnerability via the component combine_inner at /pixman-combine-float.c.

pixman: general_composite_rect() integer overflow

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.