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.
4.4.0-203.2354.4.0-1122.1364.15.0-1094.101~16.04.14.15.0-1108.120~16.04.14.15.0-1093.106~16.04.14.15.0-136.140~16.04.14.10.0-14.16~16.04.14.10.0-19.21~16.04.14.10.0-20.22~16.04.14.10.0-21.23~16.04.14.10.0-22.24~16.04.14.10.0-24.28~16.04.14.10.0-26.30~16.04.14.11.0-13.19~16.04.14.11.0-14.20~16.04.14.13.0-16.19~16.04.3+13 more4.4.0-1088.974.15.0-1065.73~16.04.14.4.0-1146.156Exploitability
AV:LAC:HPR:LUI:NScope
S:UImpact
C:LI:LA:NCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N