CVE-2020-29368

Name: CVE-2020-29368
Creator: NVD / NIST
Published: 2020-11-28T07:15:11.46+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7/10EPSS 0.36%

Last modified Jun 17, 2026

CVE-2020-29368 is a high-severity vulnerability rated 7/10 on the CVSS scale. 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.. EPSS estimates a 0.36% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7/10

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.36%

27.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-362

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 4.5.5, < 4.9.228
Linux	Linux Kernel	>= 4.10, < 4.14.185
Linux	Linux Kernel	>= 4.15, < 4.19.129
Linux	Linux Kernel	>= 4.20, < 5.4.48
Linux	Linux Kernel	>= 5.5, < 5.7.5
Netapp	Cloud Backup	All versions
Netapp	Element Software	All versions
Netapp	Hci Management Node	All versions
Netapp	Solidfire	All versions
Netapp	Hci Bootstrap Os	All versions
Netapp	H410c Firmware	All versions

References

https://bugs.chromium.org/p/project-zero/issues/detail?id=2045Exploit, Issue Tracking, Patch, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.5Release Notes, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c444eb564fb16645c172d550359cb3d75fe8a040Patch, Vendor Advisory
https://security.netapp.com/advisory/ntap-20210108-0002/Third Party Advisory
https://bugs.chromium.org/p/project-zero/issues/detail?id=2045Exploit, Issue Tracking, Patch, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.5Release Notes, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c444eb564fb16645c172d550359cb3d75fe8a040Patch, Vendor Advisory
https://security.netapp.com/advisory/ntap-20210108-0002/Third Party Advisory

Timeline

Published: Nov 28, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-29368?

How severe is CVE-2020-29368?

CVE-2020-29368 has a CVSS score of 7/10 (HIGH severity). The EPSS model estimates a 0.36% probability of exploitation in the next 30 days.

How do I fix CVE-2020-29368?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-29368?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST