{"id":"CVE-2021-29564","details":"TensorFlow is an end-to-end open source platform for machine learning. An attacker can trigger a null pointer dereference in the implementation of `tf.raw_ops.EditDistance`. This is because the implementation(https://github.com/tensorflow/tensorflow/blob/79865b542f9ffdc9caeb255631f7c56f1d4b6517/tensorflow/core/kernels/edit_distance_op.cc#L103-L159) has incomplete validation of the input parameters. The fix will be included in TensorFlow 2.5.0. We will also cherrypick this commit on TensorFlow 2.4.2, TensorFlow 2.3.3, TensorFlow 2.2.3 and TensorFlow 2.1.4, as these are also affected and still in supported range.","aliases":["BIT-tensorflow-2021-29564","GHSA-75f6-78jr-4656","PYSEC-2021-201","PYSEC-2021-492","PYSEC-2021-690"],"modified":"2026-04-12T02:46:00.296524Z","published":"2021-05-14T20:15:13.557Z","related":["GHSA-75f6-78jr-4656"],"references":[{"type":"FIX","url":"https://github.com/tensorflow/tensorflow/commit/f4c364a5d6880557f6f5b6eb5cee2c407f0186b3"},{"type":"FIX","url":"https://github.com/tensorflow/tensorflow/security/advisories/GHSA-75f6-78jr-4656"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/tensorflow/tensorflow","events":[{"introduced":"0"},{"fixed":"0931ea3d985bb9c8fdd054a5e29c4129623c849b"},{"introduced":"2b96f3662bd776e277f86997659e61046b56c315"},{"fixed":"cfe0c80169ae984bcdc99ff6de7444164aaa8e07"},{"introduced":"b36436b087bd8e8701ef51718179037cccdfc26e"},{"fixed":"3929ffacfbef7c431e8397920d040aaf47acff19"},{"introduced":"582c8d236cb079023657287c318ff26adb239002"},{"fixed":"1923123d32ea41d92b70a27a3f6ecf0763b56f6c"},{"fixed":"f4c364a5d6880557f6f5b6eb5cee2c407f0186b3"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.1.4"},{"introduced":"2.2.0"},{"fixed":"2.2.3"},{"introduced":"2.3.0"},{"fixed":"2.3.3"},{"introduced":"2.4.0"},{"fixed":"2.4.2"}],"source":["CPE_FIELD","REFERENCES"],"cpe":"cpe:2.3:a:google:tensorflow:*:*:*:*:*:*:*:*"}}],"versions":["0.5.0","0.6.0","v1.1.0-rc1","v1.1.0-rc2","v1.12.1","v1.6.0-rc1","v1.9.0-rc2","v2.1.0","v2.1.0-rc0","v2.1.0-rc1","v2.1.0-rc2","v2.1.1","v2.1.2","v2.1.3","v2.2.0","v2.2.1","v2.2.2","v2.3.0","v2.3.1","v2.3.2","v2.4.0","v2.4.1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-29564.json","vanir_signatures":[{"source":"https://github.com/tensorflow/tensorflow/commit/f4c364a5d6880557f6f5b6eb5cee2c407f0186b3","id":"CVE-2021-29564-97b7ed1b","signature_type":"Line","signature_version":"v1","deprecated":false,"target":{"file":"tensorflow/core/kernels/edit_distance_op.cc"},"digest":{"line_hashes":["119017889439403084143789088279271732282","291967294500152591996032765856155202362","200748457528354206263198298030042144555","243923674924983695802101805756038732348","97442264186003404761757948101102666923","18607674591087043388972355047488880395","142079682119944565576465901131705417208","240971709215712572896631945809374656136","252111545238731434293172848836098488950","257734348918985922525065462190031661248","58008082873749979390680400312105423676","186917967847116705355831147656716915673","322077516190707488147606739327643973330","276620107068109972948358496350284838013","71905980190354433758901536165838991082","187235317397767236747001830566682572782","156618710031479959832965118420256214246","244822362570443199788183447357987573945","67438646399639585720430175149584155484","98287763430183126610609121447678016609","230430281411344141746148896699562061630","189038095271911384052444206691327495826","172570854658435249992475226221869553097","188388080492210101186689493895063233651","73124921318083083180654483225993142459","135799392738364350314338228151580677497","67438646399639585720430175149584155484","98287763430183126610609121447678016609","72993457617132104591323652466211819354","252114010654266544431830133926194099126","172570854658435249992475226221869553097","188388080492210101186689493895063233651"],"threshold":0.9}},{"source":"https://github.com/tensorflow/tensorflow/commit/f4c364a5d6880557f6f5b6eb5cee2c407f0186b3","id":"CVE-2021-29564-fe48ba38","signature_type":"Function","signature_version":"v1","deprecated":false,"target":{"function":"ValidateShapes","file":"tensorflow/core/kernels/edit_distance_op.cc"},"digest":{"function_hash":"250643326887659465919947438795042130437","length":2349}}],"vanir_signatures_modified":"2026-04-12T02:46:00Z"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}