An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1. CREATE(Triage):(User=admin) [CVE-2020-29368|https://nvd.nist.gov/vuln/detail/CVE-2020-29368]
