VYPR
← All advisories
Moderate severityNVD Advisory· Published Dec 10, 2020· Updated Aug 4, 2024

Uninitialized memory access in Eigen types in TensorFlow

CVE-2020-26266

Description

In affected versions of TensorFlow under certain cases a saved model can trigger use of uninitialized values during code execution. This is caused by having tensor buffers be filled with the default value of the type but forgetting to default initialize the quantized floating point types in Eigen. This is fixed in versions 1.15.5, 2.0.4, 2.1.3, 2.2.2, 2.3.2, and 2.4.0.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
tensorflowPyPI
< 1.15.51.15.5
tensorflowPyPI
>= 2.0.0, < 2.0.42.0.4
tensorflowPyPI
>= 2.1.0, < 2.1.32.1.3
tensorflowPyPI
>= 2.2.0, < 2.2.22.2.2
tensorflowPyPI
>= 2.3.0, < 2.3.22.3.2
tensorflow-cpuPyPI
< 1.15.51.15.5
tensorflow-cpuPyPI
>= 2.0.0, < 2.0.42.0.4
tensorflow-cpuPyPI
>= 2.1.0, < 2.1.32.1.3
tensorflow-cpuPyPI
>= 2.2.0, < 2.2.22.2.2
tensorflow-cpuPyPI
>= 2.3.0, < 2.3.22.3.2
tensorflow-gpuPyPI
< 1.15.51.15.5
tensorflow-gpuPyPI
>= 2.0.0, < 2.0.42.0.4
tensorflow-gpuPyPI
>= 2.1.0, < 2.1.32.1.3
tensorflow-gpuPyPI
>= 2.2.0, < 2.2.22.2.2
tensorflow-gpuPyPI
>= 2.3.0, < 2.3.22.3.2

Affected products

1

Patches

1
ace0c15a22f7

Default initialize fixed point Eigen types.

https://github.com/tensorflow/tensorflowMihai MaruseacNov 24, 2020via ghsa
commit
1 file changed · +5 −5
  • third_party/eigen3/unsupported/Eigen/CXX11/src/FixedPoint/FixedPointTypes.h+5 −5 modified
    @@ -49,7 +49,7 @@ struct scalar_product_traits<QInt32, double> {
 // the compiler from silently type cast the mantissa into a bigger or a smaller
 // representation.
 struct QInt8 {
-  QInt8() {}
+  QInt8() : value(0) {}
   QInt8(const int8_t v) : value(v) {}
   QInt8(const QInt32 v);
 
@@ -59,7 +59,7 @@ struct QInt8 {
 };
 
 struct QUInt8 {
-  QUInt8() {}
+  QUInt8() : value(0) {}
   QUInt8(const uint8_t v) : value(v) {}
   QUInt8(const QInt32 v);
 
@@ -69,7 +69,7 @@ struct QUInt8 {
 };
 
 struct QInt16 {
-  QInt16() {}
+  QInt16() : value(0) {}
   QInt16(const int16_t v) : value(v) {}
   QInt16(const QInt32 v);
   operator int() const { return static_cast<int>(value); }
@@ -78,7 +78,7 @@ struct QInt16 {
 };
 
 struct QUInt16 {
-  QUInt16() {}
+  QUInt16() : value(0) {}
   QUInt16(const uint16_t v) : value(v) {}
   QUInt16(const QInt32 v);
   operator int() const { return static_cast<int>(value); }
@@ -87,7 +87,7 @@ struct QUInt16 {
 };
 
 struct QInt32 {
-  QInt32() {}
+  QInt32() : value(0) {}
   QInt32(const int8_t v) : value(v) {}
   QInt32(const int32_t v) : value(v) {}
   QInt32(const uint32_t v) : value(static_cast<int32_t>(v)) {}

Vulnerability mechanics

Generated by null/stub on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.

References

7

News mentions

0

No linked articles in our index yet.