CVE-2021-37692

Advisory

Tensorflow-gpu versions 2.5.1 and 2.6.0 include a fix for CVE-2021-37692:
In affected versions under certain conditions, Go code can trigger a segfault in string deallocation. For string tensors, "C.TF_TString_Dealloc" is called during garbage collection within a finalizer function. However, tensor structure isn't checked until encoding to avoid a performance penalty. The current method for dealloc assumes that encoding succeeded, but segfaults when a string tensor is garbage collected whose encoding failed (e.g., due to mismatched dimensions). To fix this, the call to set the finalizer function is deferred until "NewTensor" returns and, if encoding failed for a string tensor, deallocs are determined based on bytes written. The Tensorflow team has patched the issue in GitHub commit:
https://github.com/tensorflow/tensorflow/commit/8721ba96e5760c229217b594f6d2ba332beedf22
https://github.com/tensorflow/tensorflow/pull/50508
https://github.com/tensorflow/tensorflow/security/advisories/GHSA-cmgw-8vpc-rc59

Affected package

Affected versions

Fixed versions

Vulnerability changelog

This vulnerability has no description

Resources

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-37692
• https://github.com/tensorflow/tensorflow/commit/8721ba96e5760c229217b594f6d2ba332beedf22
• https://github.com/tensorflow/tensorflow/pull/50508
• https://github.com/tensorflow/tensorflow/security/advisories/GHSA-cmgw-8vpc-rc59