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Vulnerability record · CVE-2020-29369 · published 28 November 2020

CVE-2020-29369: Linux kernel race condition vulnerability

Linux · Linux Kernel

An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call, aka CID-246c320a8cfe.

7.0 CVSS 3.1 High EPSS 0.46% · top 62.9% CWE-362 · Race condition
7.0CVSS 3.1 base score, v2 6.9
0.46%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
12References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call, aka CID-246c320a8cfe.

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

Affected products

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

References

LinkTags
http://www.openwall.com/lists/oss-security/2021/02/10/6 Mailing ListPatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/02/19/8 Mailing ListPatchThird Party Advisory
https://bugs.chromium.org/p/project-zero/issues/detail?id=2056 ExploitIssue TrackingPatchThird Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.11 Release NotesVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=246c320a8cfe0b11d81a4af38fa9985ef0cc9a4c PatchVendor Advisory
https://security.netapp.com/advisory/ntap-20210115-0001/ Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/02/10/6 Mailing ListPatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/02/19/8 Mailing ListPatchThird Party Advisory
https://bugs.chromium.org/p/project-zero/issues/detail?id=2056 ExploitIssue TrackingPatchThird Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.11 Release NotesVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=246c320a8cfe0b11d81a4af38fa9985ef0cc9a4c PatchVendor Advisory
https://security.netapp.com/advisory/ntap-20210115-0001/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-29369), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.