{"id":"CVE-2020-29368","details":"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.","aliases":["A-174738029","ASB-A-174738029"],"modified":"2026-03-15T22:35:49.306176Z","published":"2020-11-28T07:15:11.460Z","related":["ALSA-2021:4356","SUSE-SU-2021:0359-1","SUSE-SU-2021:0362-1","SUSE-SU-2021:0367-1","SUSE-SU-2021:0377-1","SUSE-SU-2021:0386-1","SUSE-SU-2021:0735-1","SUSE-SU-2021:0736-1","SUSE-SU-2021:0737-1","SUSE-SU-2021:0738-1","SUSE-SU-2021:0740-1","SUSE-SU-2021:0741-1","SUSE-SU-2021:0808-1","SUSE-SU-2021:0809-1","SUSE-SU-2021:0818-1","SUSE-SU-2021:0823-1","SUSE-SU-2021:0826-1","SUSE-SU-2021:0840-1","SUSE-SU-2021:0841-1","SUSE-SU-2021:0842-1","SUSE-SU-2021:0849-1","SUSE-SU-2021:0853-1","SUSE-SU-2021:0859-1","SUSE-SU-2021:0864-1","SUSE-SU-2021:0868-1","SUSE-SU-2021:0869-1","SUSE-SU-2021:1046-1","SUSE-SU-2021:1175-1","SUSE-SU-2021:1176-1","SUSE-SU-2021:1210-1","openSUSE-SU-2021:0393-1"],"references":[{"type":"ADVISORY","url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.5"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210108-0002/"},{"type":"FIX","url":"https://bugs.chromium.org/p/project-zero/issues/detail?id=2045"},{"type":"FIX","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c444eb564fb16645c172d550359cb3d75fe8a040"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"4.5.5"},{"fixed":"4.9.228"}]},{"events":[{"introduced":"4.10"},{"fixed":"4.14.185"}]},{"events":[{"introduced":"4.15"},{"fixed":"4.19.129"}]},{"events":[{"introduced":"4.20"},{"fixed":"5.4.48"}]},{"events":[{"introduced":"5.5"},{"fixed":"5.7.5"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-29368.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}