{"id":"CVE-2026-90401","revision":"22a9feb188414a02a3678f5603dc3d39","records":[{"revision":"22a9feb188414a02a3678f5603dc3d39","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90401","aliases":[],"title":"md: remove REQ_NOWAIT support from raid1/10/456","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd: remove REQ_NOWAIT support from raid1/10/456\n\nREQ_NOWAIT support in md personalities that can block internally is\nfundamentally incomplete. While reads can avoid some blocking paths,\nwrite requests can still encounter cases where one mirror succeeds while\nanother returns -EAGAIN. At that point md cannot distinguish queue\npressure from a real device failure, so it can neither record a bad\nblock nor safely retry the write without REQ_NOWAIT, leaving mirrors\nwith divergent data.\n\nRather than continue advertising REQ_NOWAIT support for personalities\nthat cannot implement it correctly, remove it from raid1, raid10 and\nraid456. Keep REQ_NOWAIT for linear and raid0, which only remap bios to\ntheir underlying devices; stacked limits will still clear the feature if\nany component device lacks REQ_NOWAIT support.","state":0,"publishedAt":"2026-09-17T16:09:31.556+00:00","modifiedAt":"2026-10-19T09:03:05.286+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/md/md-bitmap.c\",\n                        \"drivers/md/md-bitmap.h\",\n                        \"drivers/md/md-linear.c\",\n                        \"drivers/md/md-llbitmap.c\",\n                        \"drivers/md/md.c\",\n                        \"drivers/md/raid0.c\",\n                        \"drivers/md/raid1-10.c\",\n                        \"drivers/md/raid1.c\",\n                        \"drivers/md/raid10.c\",\n                        \"drivers/md/raid5.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"f51d46d0e7cb5b8494aa534d276a9d8915a2443d\",\n                            \"lessThan\": \"ffcc9ea4e4d121c78aef6654a1577aa7d120774d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f51d46d0e7cb5b8494aa534d276a9d8915a2443d\",\n                            \"lessThan\": \"9bb9504e2d8f3d22ef12d51c333dd499f402dc8f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f51d46d0e7cb5b8494aa534d276a9d8915a2443d\",\n                            \"lessThan\": \"3fe5b7c9fb72ccc29bfd0f955b124892af7e3674\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"39db562b3fedb93978a7e42dd216b306740959f8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.15.111\",\n                            \"lessThan\": \"5.16\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/md/md-bitmap.c\",\n                        \"drivers/md/md-bitmap.h\",\n                        \"drivers/md/md-linear.c\",\n                        \"drivers/md/md-llbitmap.c\",\n                        \"drivers/md/md.c\",\n                        \"drivers/md/raid0.c\",\n                        \"drivers/md/raid1-10.c\",\n                        \"drivers/md/raid1.c\",\n                        \"drivers/md/raid10.c\",\n                        \"drivers/md/raid5.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.17\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.17\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.57\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/ffcc9ea4e4d121c78aef6654a1577aa7d120774d","https://git.kernel.org/stable/c/9bb9504e2d8f3d22ef12d51c333dd499f402dc8f","https://git.kernel.org/stable/c/3fe5b7c9fb72ccc29bfd0f955b124892af7e3674"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90401","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90401","identifiers":["CVE-2026-90401"]},"retained":false,"historicalAffected":[]}],"coverage":[]}