Race Condition in Copy-on-Write Implementation Grants Unintended Write Access in Linux Kernel (CVE-2020-10757)

Race Condition in Copy-on-Write Implementation Grants Unintended Write Access in Linux Kernel (CVE-2020-10757)

CVE-2020-29368 · HIGH Severity

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

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.

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