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Vulnerability record · CVE-2020-29368 · published 28 November 2020

CVE-2020-29368: Linux kernel race condition vulnerability

Linux · Linux Kernel

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.

7.0 CVSS 3.1 High EPSS 0.37% · top 72.2% CWE-362 · Race condition
7.0CVSS 3.1 base score, v2 6.9
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugs.chromium.org/p/project-zero/issues/detail?id=2045 ExploitIssue TrackingPatchThird Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.5 Release NotesVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c444eb564fb16645c172d550359cb3d75fe8a040 PatchVendor Advisory
https://security.netapp.com/advisory/ntap-20210108-0002/ Third Party Advisory
https://bugs.chromium.org/p/project-zero/issues/detail?id=2045 ExploitIssue TrackingPatchThird Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.5 Release NotesVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c444eb564fb16645c172d550359cb3d75fe8a040 PatchVendor Advisory
https://security.netapp.com/advisory/ntap-20210108-0002/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-29368), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.