Release 2.8.1

This releases introduces several vulnerability fixes:

• Fixes a code injection in saved_model_cli (CVE-2022-29216)
• Fixes a missing validation which causes TensorSummaryV2 to crash (CVE-2022-29193)
• Fixes a missing validation which crashes QuantizeAndDequantizeV4Grad (CVE-2022-29192)
• Fixes a missing validation which causes denial of service via DeleteSessionTensor (CVE-2022-29194)
• Fixes a missing validation which causes denial of service via GetSessionTensor (CVE-2022-29191)
• Fixes a missing validation which causes denial of service via StagePeek (CVE-2022-29195)
• Fixes a missing validation which causes denial of service via UnsortedSegmentJoin (CVE-2022-29197)
• Fixes a missing validation which causes denial of service via LoadAndRemapMatrix (CVE-2022-29199)
• Fixes a missing validation which causes denial of service via SparseTensorToCSRSparseMatrix (CVE-2022-29198)
• Fixes a missing validation which causes denial of service via LSTMBlockCell (CVE-2022-29200)
• Fixes a missing validation which causes denial of service via Conv3DBackpropFilterV2 (CVE-2022-29196)
• Fixes a CHECK failure in depthwise ops via overflows (CVE-2021-41197)
• Fixes issues arising from undefined behavior stemming from users supplying invalid resource handles (CVE-2022-29207)
• Fixes a segfault due to missing support for quantized types (CVE-2022-29205)
• Fixes a missing validation which results in undefined behavior in SparseTensorDenseAdd (CVE-2022-29206)
• Fixes a missing validation which results in undefined behavior in QuantizedConv2D (CVE-2022-29201)
• Fixes an integer overflow in SpaceToBatchND (CVE-2022-29203)
• Fixes a segfault and OOB write due to incomplete validation in EditDistance (CVE-2022-29208)
• Fixes a missing validation which causes denial of service via Conv3DBackpropFilterV2 (CVE-2022-29204)
• Fixes a denial of service in tf.ragged.constant due to lack of validation (CVE-2022-29202)
• Fixes a segfault when tf.histogram_fixed_width is called with NaN values (CVE-2022-29211)
• Fixes a core dump when loading TFLite models with quantization (CVE-2022-29212)
• Fixes crashes stemming from incomplete validation in signal ops (CVE-2022-29213)
• Fixes a type confusion leading to CHECK-failure based denial of service (CVE-2022-29209)
• Fixes a heap buffer overflow due to incorrect hash function (CVE-2022-29210)
• Updates curl to 7.83.1 to handle (CVE-2022-22576, (CVE-2022-27774, (CVE-2022-27775, (CVE-2022-27776, (CVE-2022-27778, (CVE-2022-27779, (CVE-2022-27780, (CVE-2022-27781, (CVE-2022-27782 and (CVE-2022-30115
• Updates zlib to 1.2.12 after 1.2.11 was pulled due to security issue