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.
Exploitability
AV:LAC:HPR:LUI:NScope
S:UImpact
C:LI:LA:N3.6/CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N