z2d is a pure Zig 2D graphics library. Versions of z2d after "0.5.1" and up to and including "0.6.0", when writing from one surface to another using "z2d.compositor.StrideCompositor.run", and higher-level operations when the anti-aliasing mode is set to ".default" (such as "Context.fill", "Context.stroke", "painter.fill", and "painter.stroke"), the source surface can be completely out-of-bounds on the x-axis, but not on the y-axis, by way of a negative offset. This results in an overflow of the value controlling the length of the stride. In non-safe optimization modes (consumers compiling with "ReleaseFast" or "ReleaseSmall"), this could potentially lead to invalid memory accesses or corruption. This issue is patched in version "0.6.1". Users on an untagged version after "v0.5.1" and before "v0.6.1" are advised to update to address the vulnerability. Those still on Zig "0.13.0" are recommended to downgrade to "v0.5.1".