{"api_version":"1","generated_at":"2026-10-26T13:01:12+00:00","cve":"CVE-2026-98681","urls":{"html":"https://cve.report/CVE-2026-98681","api":"https://cve.report/api/cve/CVE-2026-98681.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98681","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98681"},"summary":{"title":"smb: client: split cifsFileInfo bitfields to avoid shared-byte RMW races","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: split cifsFileInfo bitfields to avoid shared-byte RMW races\n\nThe invalidHandle, swapfile, oplock_break_cancelled, offload,\nand status_file_deleted fields are stored in the same bitfield byte\nin struct cifsFileInfo, but are updated in different code paths that\nmay run simultaneously, and are protected by different locks.  Since\nbitfield assignments generate byte-level read-modify-write operations,\na modification to one flag can overwrite a concurrent modification to\nanother flag.\n\nTo avoid these races, convert these flags from a bitfield to\nseparate bool fields.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:21","updated_at":"2026-10-21 13:21:37"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/3786ee67658a2c80fef2544e7de2cd329e043cf9","name":"https://git.kernel.org/stable/c/3786ee67658a2c80fef2544e7de2cd329e043cf9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3b8e7928cf1928555dc05d172dd02fb0e7692ec4","name":"https://git.kernel.org/stable/c/3b8e7928cf1928555dc05d172dd02fb0e7692ec4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d9d23d115610e0342e768f6cb525d91c7b154027","name":"https://git.kernel.org/stable/c/d9d23d115610e0342e768f6cb525d91c7b154027","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/19465a9aeb664f1d710d0d22c07c31bfb7c85446","name":"https://git.kernel.org/stable/c/19465a9aeb664f1d710d0d22c07c31bfb7c85446","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4165641d06ef44f3a31b77a28048b6c737e885e7","name":"https://git.kernel.org/stable/c/4165641d06ef44f3a31b77a28048b6c737e885e7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98681","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98681","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3bc303c254335dbd7c7012cc1760b12f1d5514d3 3b8e7928cf1928555dc05d172dd02fb0e7692ec4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3bc303c254335dbd7c7012cc1760b12f1d5514d3 3786ee67658a2c80fef2544e7de2cd329e043cf9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3bc303c254335dbd7c7012cc1760b12f1d5514d3 4165641d06ef44f3a31b77a28048b6c737e885e7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3bc303c254335dbd7c7012cc1760b12f1d5514d3 d9d23d115610e0342e768f6cb525d91c7b154027 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3bc303c254335dbd7c7012cc1760b12f1d5514d3 19465a9aeb664f1d710d0d22c07c31bfb7c85446 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.32","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.32 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.160 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.113 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.56 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.10 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"98681","cve":"CVE-2026-98681","epss":"0.001680000","percentile":"0.057090000","score_date":"2026-10-21","updated_at":"2026-10-22 00:15:10"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/smb/client/cifsglob.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3b8e7928cf1928555dc05d172dd02fb0e7692ec4","status":"affected","version":"3bc303c254335dbd7c7012cc1760b12f1d5514d3","versionType":"git"},{"lessThan":"3786ee67658a2c80fef2544e7de2cd329e043cf9","status":"affected","version":"3bc303c254335dbd7c7012cc1760b12f1d5514d3","versionType":"git"},{"lessThan":"4165641d06ef44f3a31b77a28048b6c737e885e7","status":"affected","version":"3bc303c254335dbd7c7012cc1760b12f1d5514d3","versionType":"git"},{"lessThan":"d9d23d115610e0342e768f6cb525d91c7b154027","status":"affected","version":"3bc303c254335dbd7c7012cc1760b12f1d5514d3","versionType":"git"},{"lessThan":"19465a9aeb664f1d710d0d22c07c31bfb7c85446","status":"affected","version":"3bc303c254335dbd7c7012cc1760b12f1d5514d3","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/smb/client/cifsglob.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.32"},{"lessThan":"2.6.32","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.160","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.113","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.56","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.160","versionStartIncluding":"2.6.32","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.113","versionStartIncluding":"2.6.32","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.56","versionStartIncluding":"2.6.32","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.10","versionStartIncluding":"2.6.32","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"2.6.32","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: split cifsFileInfo bitfields to avoid shared-byte RMW races\n\nThe invalidHandle, swapfile, oplock_break_cancelled, offload,\nand status_file_deleted fields are stored in the same bitfield byte\nin struct cifsFileInfo, but are updated in different code paths that\nmay run simultaneously, and are protected by different locks.  Since\nbitfield assignments generate byte-level read-modify-write operations,\na modification to one flag can overwrite a concurrent modification to\nanother flag.\n\nTo avoid these races, convert these flags from a bitfield to\nseparate bool fields."}],"providerMetadata":{"dateUpdated":"2026-10-21T12:55:40.186Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/3b8e7928cf1928555dc05d172dd02fb0e7692ec4"},{"url":"https://git.kernel.org/stable/c/3786ee67658a2c80fef2544e7de2cd329e043cf9"},{"url":"https://git.kernel.org/stable/c/4165641d06ef44f3a31b77a28048b6c737e885e7"},{"url":"https://git.kernel.org/stable/c/d9d23d115610e0342e768f6cb525d91c7b154027"},{"url":"https://git.kernel.org/stable/c/19465a9aeb664f1d710d0d22c07c31bfb7c85446"}],"title":"smb: client: split cifsFileInfo bitfields to avoid shared-byte RMW races","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98681","datePublished":"2026-10-18T15:45:45.654Z","dateReserved":"2026-09-25T10:25:14.364Z","dateUpdated":"2026-10-21T12:55:40.186Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:21","lastModifiedDate":"2026-10-21 13:21:37","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98681","Ordinal":"1","Title":"smb: client: split cifsFileInfo bitfields to avoid shared-byte R","CVE":"CVE-2026-98681","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98681","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: split cifsFileInfo bitfields to avoid shared-byte RMW races\n\nThe invalidHandle, swapfile, oplock_break_cancelled, offload,\nand status_file_deleted fields are stored in the same bitfield byte\nin struct cifsFileInfo, but are updated in different code paths that\nmay run simultaneously, and are protected by different locks.  Since\nbitfield assignments generate byte-level read-modify-write operations,\na modification to one flag can overwrite a concurrent modification to\nanother flag.\n\nTo avoid these races, convert these flags from a bitfield to\nseparate bool fields.","Type":"Description","Title":"smb: client: split cifsFileInfo bitfields to avoid shared-byte R"}]}}}