An issue was discovered in Pillow before 8.1.1. In TiffDecode.c, there is a negative-offset memcpy with an invalid size. An issue was discovered in Pillow before 8.1.1. In TiffDecode.c, there is an out-of-bounds read in TiffreadRGBATile via invalid tile boundaries. An issue was discovered in Pillow before 8.1.1. There is an out-of-bounds read in SGIRleDecode.c. Pillow before 8.1.1 allows attackers to cause a denial of service because the reported size of a contained image is not properly checked for a BLP container, and thus an attempted memory allocation can be very large. Pillow before 8.1.1 allows attackers to cause a denial of service because the reported size of a contained image is not properly checked for an ICNS container, and thus an attempted memory allocation can be very large. Pillow before 8.1.1 allows attackers to cause a denial of service because the reported size of a contained image is not properly checked for an ICO container, and thus an attempted memory allocation can be very large. An issue was discovered in Pillow before 8.2.0. For FLI data, FliDecode did not properly check that the block advance was non-zero, potentially leading to an infinite loop on load. An issue was discovered in Pillow before 8.2.0. For EPS data, the readline implementation used in EPSImageFile has to deal with any combination of \r and \n as line endings. It used an accidentally quadratic method of accumulating lines while looking for a line ending. A malicious EPS file could use this to perform a DoS of Pillow in the open phase, before an image was accepted for opening. Pillow through 8.2.0 and PIL through 1.1.7 allow an attacker to pass controlled parameters directly into a convert function to trigger a buffer overflow in Convert.c. Pillow before 9.2.0 performs Improper Handling of Highly Compressed GIF Data . Pillow before 9.3.0 allows denial of service via SAMPLESPERPIXEL