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CVE-2020-28975

scikit-learn Denial of Service

7.5 HighFix availableDisputed

svm_predict_values in svm.cpp in Libsvm v324, as used in scikit-learn 0.23.2 and other products, allows attackers to cause a denial of service (segmentation fault) via a crafted model SVM (introduced via pickle, json, or any other model permanence standard) with a large value in the _n_support array. NOTE: the scikit-learn vendor's position is that the behavior can only occur if the library's API is violated by an application that changes a private attribute.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

3.57%Up 2.3 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 7.5

svm_predict_values in svm.cpp in Libsvm v324, as used in scikit-learn 0.23.2 and other products, allows attackers to cause a denial of service (segmentation fault) via a crafted model SVM (introduced via pickle, json, or any other model permanence standard) with a large value in the _n_support array. NOTE: the scikit-learn vendor's position is that the behavior can only occur if the library's API is violated by an application that changes a private attribute.

Record
CVE-2020-28975
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Updated
2026-11-02
CVE List No score

svm_predict_values in svm.cpp in Libsvm v324, as used in scikit-learn 0.23.2 and other products, allows attackers to cause a denial of service (segmentation fault) via a crafted model SVM (introduced via pickle, json, or any other model permanence standard) with a large value in the _n_support array. NOTE: the scikit-learn vendor's position is that the behavior can only occur if the library's API is violated by an application that changes a private attribute.

Record
CVE-2020-28975
Updated
2026-11-02
EUVDEUVD-2020-0180 No score

svm_predict_values in svm.cpp in Libsvm v324, as used in scikit-learn 0.23.2 and other products, allows attackers to cause a denial of service (segmentation fault) via a crafted model SVM (introduced via pickle, json, or any other model permanence standard) with a large value in the _n_support array. NOTE: the scikit-learn vendor's position is that the behavior can only occur if the library's API is violated by an application that changes a private attribute.

Record
EUVD-2020-0180
Updated
2026-11-03
GitHub AdvisoriesGHSA-jxfp-4rvq-9h9m 7.5

scikit-learn Denial of Service

svm_predict_values in svm.cpp in Libsvm v324, as used in scikit-learn 0.23.2 and other products, allows attackers to cause a denial of service (segmentation fault) via a crafted model SVM (introduced via pickle, json, or any other model permanence standard) with a large value in the _n_support array. NOTE: the scikit-learn vendor's position is that the behavior can only occur if the library's API is violated by an application that changes a private attribute.

Record
GHSA-jxfp-4rvq-9h9m
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV 7.5

svm_predict_values in svm.cpp in Libsvm v324, as used in scikit-learn 0.23.2 and other products, allows attackers to cause a denial of service (segmentation fault) via a crafted model SVM (introduced via pickle, json, or any other model permanence standard) with a large value in the _n_support array. NOTE: the scikit-learn vendor's position is that the behavior can only occur if the library's API is violated by an application that changes a private attribute.

Record
CVE-2020-28975
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVGHSA-jxfp-4rvq-9h9m 7.5

scikit-learn Denial of Service

svm_predict_values in svm.cpp in Libsvm v324, as used in scikit-learn 0.23.2 and other products, allows attackers to cause a denial of service (segmentation fault) via a crafted model SVM (introduced via pickle, json, or any other model permanence standard) with a large value in the _n_support array. NOTE: the scikit-learn vendor's position is that the behavior can only occur if the library's API is violated by an application that changes a private attribute.

Record
GHSA-jxfp-4rvq-9h9m
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2024:11805-1 No score

python310-scikit-learn-1.0.2-1.1 on GA media

These are all security issues fixed in the python310-scikit-learn-1.0.2-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11805-1
Updated
2026-11-02
OSVopenSUSE-SU-2025:14729-1 No score

python311-scikit-learn-1.6.1-1.1 on GA media

These are all security issues fixed in the python311-scikit-learn-1.6.1-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2025:14729-1
Updated
2026-11-02
OSVPYSEC-2020-108 No score

** DISPUTED ** svm_predict_values in svm.cpp in Libsvm v324, as used in scikit-learn 0.23.2 and other products, allows attackers to cause a denial of service (segmentation fault) via a crafted model SVM (introduced via pickle, json, or any other model permanence standard) with a large value in the _n_support array. NOTE: the scikit-learn vendor's position is that the behavior can only occur if the library's API is violated by an application that changes a private attribute.

Record
PYSEC-2020-108
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
scikit-learn
PyPI
0.23.2 up to 1.0.1
1.0.1
scikit-learn
PyPI
0.23.2 up to 1.0.1, plus listed versions
0.24.00.24.10.24.21.0
1.0.1
scikit-learn
PyPI
before 0.24.dev0, plus listed versions
0.100.110.120.12.10.13
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0.13.10.140.14.10.14a10.15.00.15.0b10.15.0b20.15.10.15.20.16.00.16.10.16b10.170.17.10.17b10.180.18.10.18.20.18rc20.19.00.19.10.19.20.19b20.20.00.20.10.20.20.20.30.20.40.20rc10.21.00.21.10.21.20.21.30.21rc20.220.22.10.22.20.22.2.post10.22rc2.post10.22rc30.23.00.23.0rc10.23.10.23.20.9
0.24.dev0
python-scikit-learn
openSUSE:Tumbleweed
before 1.6.1-1.1
1.6.1-1.1

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-28975 is a high vulnerability (CVSS 7.5) in Scikit-learn, published November 21, 2020. Its validity is disputed. EPSS puts the chance of exploitation in the next 30 days at 3.57%, the 89th percentile. Fixed in scikit-learn 1.0.1.

References

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