Vulnerability Monitor

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CVE-2020-29368

An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.0, requiring local system access to exploit but requires specific conditions to be met without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 9 products from linux, from netapp, from netapp and 6 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-11-28T07:15:11.460

Last Modified

2024-11-21T05:23:55.457

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.0 (HIGH)

CVSSv2 Vector

AV:L/AC:M/Au:N/C:C/I:C/A:C

Access Vector: LOCAL
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

3.4

Impact Score

10.0

Weaknesses

Type: Primary
CWE-362

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	linux	linux_kernel	< 4.9.228	Yes
Operating System	linux	linux_kernel	< 4.14.185	Yes
Operating System	linux	linux_kernel	< 4.19.129	Yes
Operating System	linux	linux_kernel	< 5.4.48	Yes
Operating System	linux	linux_kernel	< 5.7.5	Yes
Application	netapp	cloud_backup	-	Yes
Application	netapp	element_software	-	Yes
Application	netapp	hci_management_node	-	Yes
Application	netapp	solidfire	-	Yes
Operating System	netapp	hci_bootstrap_os	-	Yes
Hardware	netapp	hci_compute_node	-	No
Operating System	netapp	h410c_firmware	-	Yes
Hardware	netapp	h410c	-	No

References

https://bugs.chromium.org/p/project-zero/issues/detail?id=2045 Exploit, Issue Tracking, Patch, Third Party Advisory ([email protected])
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.5 Release Notes, Vendor Advisory ([email protected])
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c444eb564fb16645c172d550359cb3d75fe8a040 Patch, Vendor Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20210108-0002/ Third Party Advisory ([email protected])
https://bugs.chromium.org/p/project-zero/issues/detail?id=2045 Exploit, Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.5 Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c444eb564fb16645c172d550359cb3d75fe8a040 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20210108-0002/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For linux's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.