212 lines
11 KiB
JSON
212 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-98684",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-25T10:25:14.364Z",
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"datePublished": "2026-10-18T15:45:52.828Z",
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"dateUpdated": "2026-11-10T18:15:17.155Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-11-10T18:15:17.155Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: flush and commit data before querying allocated ranges\n\nThe mode 0 / FALLOC_FL_KEEP_SIZE fallocate emulation for small interior\nranges in smb3_simple_fallocate_range() issues\nFSCTL_QUERY_ALLOCATED_RANGES and zero-fills any sub-range the server\nreports as an unallocated hole, to force block allocation without\nchanging file contents.\n\nThis is unsafe against Windows servers. Per the Win32 documentation,\nFSCTL_QUERY_ALLOCATED_RANGES only reports ranges that *may* contain\nnonzero data and is explicitly not coherent with recently written data:\n\n \"a call to FSCTL_QUERY_ALLOCATED_RANGES [after writing to a network\n file] would not necessarily return a correct list of allocated\n regions. To ensure coherency [...] flush the data to the file\"\n\nfsx (generic/363) reproduces the resulting corruption against Windows\nServer 2022: a range is written, an uncached read returns the data, yet\nthe next FSCTL_QUERY_ALLOCATED_RANGES on that range reports it as a whole\nhole, so the emulation overwrites live data with zeroes. A network trace\nconfirmed the WRITE, the READ returning data and the query returning an\nempty range list within microseconds. Samba does not exhibit this; its\nquery is coherent with the written data.\n\nWrite back the dirty pages, drain any outstanding I/O and issue an SMB2\nFLUSH to force the server to commit the data before querying the\nallocated ranges, so the query reflects the data actually present.\n\nWith this, generic/363 passes against both Windows Server 2022 and Samba\nover 100000 fsx operations."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/smb/client/smb2ops.c"
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],
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"versions": [
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{
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"version": "966a3cb7c7db786452a87afdc3b48858fc4d4d6b",
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"lessThan": "6787575545cd8af1da3778d7c1ae43a4398a6b26",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "966a3cb7c7db786452a87afdc3b48858fc4d4d6b",
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"lessThan": "f82242fe3109a3ef72f429540b5bdde08fbfb0e4",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "966a3cb7c7db786452a87afdc3b48858fc4d4d6b",
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"lessThan": "bf84e44ff0ed802778eafd7ecb623635379cb506",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "966a3cb7c7db786452a87afdc3b48858fc4d4d6b",
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"lessThan": "aa994489bd835547c191827acc460192e147032d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "c406bb9ece6ef63721daab106f132ff4b4234e81",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "2f9f4a2d0e6fcf0673ed51195e06e47abe966900",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5e397c943424de94879830e72c95f2679e297a76",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "5.10.50",
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"lessThan": "5.11",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.12.17",
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"lessThan": "5.13",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.13.2",
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"lessThan": "5.14",
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"status": "affected",
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"versionType": "semver"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/smb/client/smb2ops.c"
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],
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"versions": [
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{
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"version": "5.14",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.14",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.117",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.56",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.10",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.12.117"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "6.18.56"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "7.2.10"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "7.3"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.10.50"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.12.17"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.13.2"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/6787575545cd8af1da3778d7c1ae43a4398a6b26"
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},
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{
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"url": "https://git.kernel.org/stable/c/f82242fe3109a3ef72f429540b5bdde08fbfb0e4"
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},
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{
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"url": "https://git.kernel.org/stable/c/bf84e44ff0ed802778eafd7ecb623635379cb506"
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},
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{
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"url": "https://git.kernel.org/stable/c/aa994489bd835547c191827acc460192e147032d"
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}
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],
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"title": "smb: client: flush and commit data before querying allocated ranges",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |