PVRIC (PowerVR Image Compression) on Imagination 2018 and later GPU devices offers software-transparent compression that enables cross-origin pixel-stealing attacks against feTurbulence and feBlend in the SVG Filter specification. For example, attackers can sometimes accurately determine text contained on a web page from one origin if they control a resource from a different origin.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-44216
• https://github.com/UT-Security/gpu-zip
• https://news.ycombinator.com/item?id=37663159
• https://www.hertzbleed.com/gpu.zip/GPU-zip.pdf
• https://arstechnica.com/security/2023/09/gpus-from-all-major-suppliers-are-vulnerable-to-new-pixel-stealing-attack
• https://blog.imaginationtech.com/introducing-pvric4-taking-image-compression-to-the-next-level
• https://blog.imaginationtech.com/reducing-bandwidth-pvric
• https://www.bleepingcomputer.com/news/security/modern-gpus-vulnerable-to-new-gpuzip-side-channel-attack
• https://www.hertzbleed.com/gpu.zip
• https://www.w3.org/TR/filter-effects-1