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Vulnerability record · CVE-2020-29374 · published 28 November 2020

CVE-2020-29374: Linux kernel race condition vulnerability

Linux · Linux Kernel

An issue was discovered in the Linux kernel before 5.7.3, related to mm/gup.c and mm/huge_memory.c. The get_user_pages (aka gup) implementation, when used for a copy-on-write page, does not properly consider the semantics of read operations and therefore can grant unintended write access, aka CID-17839856fd58.

3.6 CVSS 3.1 Low EPSS 0.41% · top 67.6% CWE-362 · Race conditionCWE-863 · Incorrect authorization
3.6CVSS 3.1 base score, v2 3.3
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
8Affected product versions listed by NVD
18References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered in the Linux kernel before 5.7.3, related to mm/gup.c and mm/huge_memory.c. The get_user_pages (aka gup) implementation, when used for a copy-on-write page, does not properly consider the semantics of read operations and therefore can grant unintended write access, aka CID-17839856fd58.

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

Affected products

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

References

LinkTags
http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html ExploitThird Party AdvisoryVDB Entry
https://bugs.chromium.org/p/project-zero/issues/detail?id=2045 ExploitIssue TrackingThird Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.3 Release NotesThird Party AdvisoryVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17839856fd588f4ab6b789f482ed3ffd7c403e1f PatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20210115-0002/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5096 Third Party Advisory
http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html ExploitThird Party AdvisoryVDB Entry
https://bugs.chromium.org/p/project-zero/issues/detail?id=2045 ExploitIssue TrackingThird Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.3 Release NotesThird Party AdvisoryVendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17839856fd588f4ab6b789f482ed3ffd7c403e1f PatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html Mailing ListThird Party Advisory
https://security.netapp.com/advisory/ntap-20210115-0002/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5096 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-29374), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.