{"id":"CVE-2026-99111","revision":null,"records":[{"revision":"d3c5254d78004410ba92d3f0ca0409cc","observedAt":"2026-10-28T11:27:43.363+00:00","statement":{"source":"cve-program","id":"CVE-2026-99111","aliases":[],"title":"smb: client: fix data corruption with concurrent writes and O_TRUNC","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix data corruption with concurrent writes and O_TRUNC\n\ncifs_do_truncate() flushes dirty pages with filemap_write_and_wait()\nand truncates the file on the server, but in the old code both\noperations ran without holding i_rwsem or invalidate_lock.  A\nconcurrent buffered write via netfs_perform_write() -- which only\nneeds i_rwsem shared -- could dirty new pages after the flush but\nbefore the local truncation, and those pages would be silently\ndiscarded by cifs_setsize() -> truncate_pagecache().\n\nFix by acquiring inode_lock (exclusive i_rwsem) and\nfilemap_invalidate_lock at the top of cifs_do_truncate(), so the\nentire flush-truncate-resize sequence is atomic with respect to:\n\n  - buffered writes (blocked by exclusive i_rwsem, since\n    netfs_start_io_write takes i_rwsem shared),\n  - read page faults (blocked by exclusive invalidate_lock, since\n    filemap_fault takes it shared),\n  - writeback collection (blocked by netfs_wb_begin/netfs_wb_end\n    around the server truncate and local resize, since\n    netfs_writepages also acquires the wb lock).","state":0,"publishedAt":"2026-10-28T10:34:29.053+00:00","modifiedAt":"2026-10-28T10:34:29.053+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/smb/client/file.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"110fee6b9bb58a5c50047fc2594d415f741b591e\",\n                            \"lessThan\": \"4d143608a0445443a85c9b29f4c9f8e63d5dbfc9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"110fee6b9bb58a5c50047fc2594d415f741b591e\",\n                            \"lessThan\": \"ffa66fdc7d35b890606767c4d2c7ac26b4d90a99\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"110fee6b9bb58a5c50047fc2594d415f741b591e\",\n                            \"lessThan\": \"a8603b52b39f520ea8a34def74c23fba87396d3e\",\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/smb/client/file.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.18\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.18\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.59\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.13\",\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":[],"references":["https://git.kernel.org/stable/c/4d143608a0445443a85c9b29f4c9f8e63d5dbfc9","https://git.kernel.org/stable/c/ffa66fdc7d35b890606767c4d2c7ac26b4d90a99","https://git.kernel.org/stable/c/a8603b52b39f520ea8a34def74c23fba87396d3e"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99111","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99111","identifiers":["CVE-2026-99111"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-31T14:05:03.5694547+00:00","complete":true,"records":1766,"lastAttemptAt":"2026-10-31T14:05:03.5694547+00:00","lastSuccessAt":"2026-10-31T14:05:03.9102612+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:03.910611+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-9266d7b009bf9c4a0ccdcb5cbdea7f905cb3c4d92fd3b41581ece16b2cfdc4e7-ec769fcf6e6e34bf3f0b54e1ac62cfffb542a122ab77efcad94c9e853e0b6490","complete":true,"records":417574,"lastAttemptAt":"2026-10-31T14:05:02.6830253+00:00","lastSuccessAt":"2026-10-31T13:33:54.3368861+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:02.6830253+00:00","snapshotPublishedAt":"2026-10-31T13:26:04+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-1ea90a365f5b43ef9a5b92be53fe0867","complete":true,"records":13565,"lastAttemptAt":"2026-10-31T14:05:07.41688+00:00","lastSuccessAt":"2026-10-31T11:34:32.033+00:00","error":null,"lastVerifiedAt":"2026-10-31T11:34:32.033+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13637,"expectedIdentifiers":13637,"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":"2026-10-31T14:05:03.5694547+00:00","complete":true,"records":1094,"lastAttemptAt":"2026-10-31T14:05:03.5694547+00:00","lastSuccessAt":"2026-10-31T14:05:04.1115496+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:04.11155+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. No reader inventory is sent.","generation":"enrichment-fb26245244484b8385c58dbbcb23d928","complete":true,"records":13577,"lastAttemptAt":"2026-10-31T14:05:06.3072816+00:00","lastSuccessAt":"2026-10-31T14:05:06.296+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:06.296+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13637,"expectedIdentifiers":13637,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-21dcd6662970dfea02e4ea60ee637115e8d92664947484d2b9276b3f6568a84f","complete":true,"records":9815,"lastAttemptAt":"2026-10-31T14:05:03.2592715+00:00","lastSuccessAt":"2026-10-30T23:47:34.1817587+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:03.2592715+00:00","snapshotPublishedAt":"2026-10-30T23:33:17+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-2de9ccc5290f060c7aa63f89c25dd76f655a64ba1aba7c05c97fa3bee4f09899","complete":true,"records":1967,"lastAttemptAt":"2026-10-31T14:05:03.0514544+00:00","lastSuccessAt":"2026-10-28T20:55:34.2982937+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:03.0514544+00:00","snapshotPublishedAt":"2026-10-28T20:03:08+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-f95f76cd406ae5bae3de632ad37fd2d5160b44f5e6b51748ac6f8f0c0c88e72b","complete":true,"records":3028,"lastAttemptAt":"2026-10-31T14:05:03.3781277+00:00","lastSuccessAt":"2026-10-30T23:47:38.4914494+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:03.3781277+00:00","snapshotPublishedAt":"2026-10-30T23:18:12+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-d37f475fd4943f3910741120036649d396d0a133edf936fc0112d88abf9bb041","complete":true,"records":230993,"lastAttemptAt":"2026-10-31T14:05:03.1555417+00:00","lastSuccessAt":"2026-10-31T12:35:41.6420764+00:00","error":null,"lastVerifiedAt":"2026-10-31T14:05:03.1555417+00:00","snapshotPublishedAt":"2026-10-31T12:33:12+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}