Linux Kernel up to 5.7.4 THP Mapcount Check mm/huge_memory.c __split_huge_pmd race condition

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.7.4. It has been rated as problematic. Affected is the function __split_huge_pmd of the file mm/huge_memory.c of the component THP Mapcount Check. Performing a manipulation results in race condition. This vulnerability is reported as CVE-2020-29368. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.7.4 (Operating System). It has been classified as problematic. This affects the function __split_huge_pmd of the file mm/huge_memory.c of the component THP Mapcount Check. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 11/28/2020. The advisory is shared at bugs.chromium.org. This vulnerability is uniquely identified as CVE-2020-29368. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 250065 (Linux Distros Unpatched Vulnerability : CVE-2020-29368), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.7.5 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (250065). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 250065
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2020-29368

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.7.5
Patch: git.kernel.org

Timelineinfo

11/28/2020 🔍
11/28/2020 +0 days 🔍
11/28/2020 +0 days 🔍
08/17/2025 +1723 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: bugs.chromium.org
Status: Confirmed

CVE: CVE-2020-29368 (🔍)
GCVE (CVE): GCVE-0-2020-29368
GCVE (VulDB): GCVE-100-165417

Entryinfo

Created: 11/28/2020 18:13
Updated: 08/17/2025 15:31
Changes: 11/28/2020 18:13 (39), 11/28/2020 18:16 (4), 12/11/2020 09:19 (2), 12/11/2020 09:23 (18), 08/17/2025 15:31 (17)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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