Release 2.5.2

This release introduces several vulnerability fixes:

• Fixes a code injection issue in saved_model_cli (CVE-2021-41228)
• Fixes a vulnerability due to use of uninitialized value in Tensorflow (CVE-2021-41225)
• Fixes a heap OOB in FusedBatchNorm kernels (CVE-2021-41223)
• Fixes an arbitrary memory read in ImmutableConst (CVE-2021-41227)
• Fixes a heap OOB in SparseBinCount (CVE-2021-41226)
• Fixes a heap OOB in SparseFillEmptyRows (CVE-2021-41224)
• Fixes a segfault due to negative splits in SplitV (CVE-2021-41222)
• Fixes segfaults and vulnerabilities caused by accesses to invalid memory during shape inference in Cudnn* ops (CVE-2021-41221)
• Fixes a null pointer exception when Exit node is not preceded by Enter op (CVE-2021-41217)
• Fixes an integer division by 0 in tf.raw_ops.AllToAll (CVE-2021-41218)
• Fixes an undefined behavior via nullptr reference binding in sparse matrix multiplication (CVE-2021-41219)
• Fixes a heap buffer overflow in Transpose (CVE-2021-41216)
• Prevents deadlocks arising from mutually recursive tf.function objects (CVE-2021-41213)
• Fixes a null pointer exception in DeserializeSparse (CVE-2021-41215)
• Fixes an undefined behavior arising from reference binding to nullptr in tf.ragged.cross (CVE-2021-41214)
• Fixes a heap OOB read in tf.ragged.cross (CVE-2021-41212)
• Fixes a heap OOB read in all tf.raw_ops.QuantizeAndDequantizeV* ops (CVE-2021-41205)
• Fixes an FPE in ParallelConcat (CVE-2021-41207)
• Fixes FPE issues in convolutions with zero size filters (CVE-2021-41209)
• Fixes a heap OOB read in tf.raw_ops.SparseCountSparseOutput (CVE-2021-41210)
• Fixes vulnerabilities caused by incomplete validation in boosted trees code (CVE-2021-41208)
• Fixes vulnerabilities caused by incomplete validation of shapes in multiple TF ops (CVE-2021-41206)
• Fixes a segfault produced while copying constant resource tensor (CVE-2021-41204)
• Fixes a vulnerability caused by unitialized access in EinsumHelper::ParseEquation (CVE-2021-41201)
• Fixes several vulnerabilities and segfaults caused by missing validation during checkpoint loading (CVE-2021-41203)
• Fixes an overflow producing a crash in tf.range (CVE-2021-41202)
• Fixes an overflow producing a crash in tf.image.resize when size is large (CVE-2021-41199)
• Fixes an overflow producing a crash in tf.tile when tiling tensor is large (CVE-2021-41198)
• Fixes a vulnerability produced due to incomplete validation in tf.summary.create_file_writer (CVE-2021-41200)
• Fixes multiple crashes due to overflow and CHECK-fail in ops with large tensor shapes (CVE-2021-41197)
• Fixes a crash in max_pool3d when size argument is 0 or negative (CVE-2021-41196)
• Fixes a crash in tf.math.segment_* operations (CVE-2021-41195)
• Updates curl to 7.78.0 to handle CVE-2021-22922, CVE-2021-22923, CVE-2021-22924, CVE-2021-22925, and CVE-2021-22926.