{"id":"CVE-2026-46256","revision":null,"records":[{"revision":"cadc7e47c7704ff4b86a030244f64a8a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-46256","aliases":[],"title":"NFS/localio: prevent direct reclaim recursion into NFS via nfs_writepages","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nNFS/localio: prevent direct reclaim recursion into NFS via nfs_writepages\n\nLOCALIO is an NFS loopback mount optimization that avoids using the\nnetwork for READ, WRITE and COMMIT if the NFS client and server are\ndetermined to be on the same system. But because LOCALIO is still\nfundamentally \"just NFS loopback mount\" it is susceptible to recursion\ndeadlock via direct reclaim, e.g.: NFS LOCALIO down to XFS and then\nback into NFS via nfs_writepages.\n\nFix LOCALIO's potential for direct reclaim deadlock by ensuring that\nall its page cache allocations are done from GFP_NOFS context.\n\nThanks to Ben Coddington for pointing out commit ad22c7a043c2 (\"xfs:\nprevent stack overflows from page cache allocation\").","state":0,"publishedAt":"2026-06-03T15:49:53.168+00:00","modifiedAt":"2026-10-21T12:41:32.006+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                        \"fs/nfs/localio.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"70ba381e1a431245c137ed597ec6a05991c79bd9\",\n                            \"lessThan\": \"9118e1cab8a5571c6a95011f77ff28480aee9cb0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"70ba381e1a431245c137ed597ec6a05991c79bd9\",\n                            \"lessThan\": \"ae26a4cf2baf0a44c538dc093504d1994b02dade\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"70ba381e1a431245c137ed597ec6a05991c79bd9\",\n                            \"lessThan\": \"6a5de0c4fc0f217eea945d3d72c34ee30d72cbc9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"70ba381e1a431245c137ed597ec6a05991c79bd9\",\n                            \"lessThan\": \"67435d2d8a33a75f9647724952cb1b18279d2e95\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\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                        \"fs/nfs/localio.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.12\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.12\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.114\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.14\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.4\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/9118e1cab8a5571c6a95011f77ff28480aee9cb0","https://git.kernel.org/stable/c/ae26a4cf2baf0a44c538dc093504d1994b02dade","https://git.kernel.org/stable/c/6a5de0c4fc0f217eea945d3d72c34ee30d72cbc9","https://git.kernel.org/stable/c/67435d2d8a33a75f9647724952cb1b18279d2e95"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-46256","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-46256","identifiers":["CVE-2026-46256"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-08T10:04:32.7352320+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-08T10:04:32.735232+00:00","lastSuccessAt":"2026-11-08T10:04:32.956954+00:00","error":null,"lastVerifiedAt":"2026-11-08T10:04:32.9569616+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-eaa64dac63caa79c8d4905619258c41c51b39e461b996124e1a21b5e85e7e738-e58a079eb6f76d5949b871c295ad9e8f78e928765ff9950581a38d46375b9852","complete":true,"records":421096,"lastAttemptAt":"2026-11-08T10:04:32.1680283+00:00","lastSuccessAt":"2026-11-08T07:59:14.3145447+00:00","error":"HttpRequestException","lastVerifiedAt":"2026-11-08T07:59:14.338564+00:00","snapshotPublishedAt":"2026-11-08T07:27:32+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-ce0df89a405747cda5b7c61ae0b48fb2","complete":true,"records":13633,"lastAttemptAt":"2026-11-08T10:04:58.8018093+00:00","lastSuccessAt":"2026-11-08T05:08:40.263+00:00","error":null,"lastVerifiedAt":"2026-11-08T05:08:40.263+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-08T10:04:32.7352320+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-08T10:04:32.735232+00:00","lastSuccessAt":"2026-11-08T10:04:32.958305+00:00","error":null,"lastVerifiedAt":"2026-11-08T10:04:32.9583056+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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