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.
References (9)
Core 9
Core References
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://bugs.chromium.org/p/project-zero/issues/detail?id=2045
Release Notes, Third Party Advisory, Vendor Advisory x_refsource_misc
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.3
Patch, Vendor Advisory x_refsource_misc
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17839856fd588f4ab6b789f482ed3ffd7c403e1f
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210115-0002/
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2022/dsa-5096
Scores
CVSS v3
3.6
EPSS
0.0002
EPSS Percentile
5.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Details
CWE
CWE-362
CWE-863
Status
published
Products (9)
debian/debian_linux
9.0
debian/debian_linux
10.0
linux/linux_kernel
< 5.7.3
netapp/500f_firmware
netapp/a250_firmware
netapp/h410c_firmware
netapp/hci_compute_node_bios
netapp/solidfire_\&_hci_management_node
netapp/solidfire_\&_hci_storage_node
Published
Nov 28, 2020
Tracked Since
Feb 18, 2026