{"id":"CVE-2020-26270","aliases":["BIT-tensorflow-2020-26270","GHSA-m648-33qf-v3gp","PYSEC-2020-256","PYSEC-2020-301","PYSEC-2020-336"],"url":"https://o3.security/vulnerability/CVE-2020-26270","summary":"CHECK-fail in LSTM with zero-length input in TensorFlow","details":"In affected versions of TensorFlow running an LSTM/GRU model where the LSTM/GRU layer receives an input with zero-length results in a CHECK failure when using the CUDA backend. This can result in a query-of-death vulnerability, via denial of service, if users can control the input to the layer. This is fixed in versions 1.15.5, 2.0.4, 2.1.3, 2.2.2, 2.3.2, and 2.4.0.","published":"2020-12-10T23:15:12.973Z","modified":"2026-08-07T15:12:17.261911Z","cvss":{"score":3.3,"severity":"LOW","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"tensorflow","fixedVersion":"1.15.5"},{"ecosystem":"PyPI","name":"tensorflow","fixedVersion":"2.0.4"},{"ecosystem":"PyPI","name":"tensorflow","fixedVersion":"2.1.3"},{"ecosystem":"PyPI","name":"tensorflow","fixedVersion":"2.2.2"},{"ecosystem":"PyPI","name":"tensorflow","fixedVersion":"2.3.2"},{"ecosystem":"PyPI","name":"tensorflow-cpu","fixedVersion":"1.15.5"},{"ecosystem":"PyPI","name":"tensorflow-cpu","fixedVersion":"2.0.4"},{"ecosystem":"PyPI","name":"tensorflow-cpu","fixedVersion":"2.1.3"},{"ecosystem":"PyPI","name":"tensorflow-cpu","fixedVersion":"2.2.2"},{"ecosystem":"PyPI","name":"tensorflow-cpu","fixedVersion":"2.3.2"},{"ecosystem":"PyPI","name":"tensorflow-gpu","fixedVersion":"1.15.5"},{"ecosystem":"PyPI","name":"tensorflow-gpu","fixedVersion":"2.0.4"},{"ecosystem":"PyPI","name":"tensorflow-gpu","fixedVersion":"2.1.3"},{"ecosystem":"PyPI","name":"tensorflow-gpu","fixedVersion":"2.2.2"},{"ecosystem":"PyPI","name":"tensorflow-gpu","fixedVersion":"2.3.2"}],"fix":{"url":"https://github.com/tensorflow/tensorflow/commit/14755416e364f17fb1870882fa778c7fec7f16e3","label":"tensorflow/tensorflow@1475541"},"references":[{"type":"FIX","url":"https://github.com/tensorflow/tensorflow/commit/14755416e364f17fb1870882fa778c7fec7f16e3"},{"type":"FIX","url":"https://github.com/tensorflow/tensorflow/security/advisories/GHSA-m648-33qf-v3gp"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T15:12:17.261911Z"}}