CVE-2026-98684

Что произошло

In the Linux kernel, the following vulnerability has been resolved: smb: client: flush and commit data before querying allocated ranges The mode 0 / FALLOC_FL_KEEP_SIZE fallocate emulation for small interior ranges in smb3_simple_fallocate_range() issues FSCTL_QUERY_ALLOCATED_RANGES and zero-fills any sub-range the server reports as an unallocated hole, to force block allocation without changing file contents. This is unsafe against Windows servers. Per the Win32 documentation, FSCTL_QUERY_ALLOCATED_RANGES only reports ranges that *may* contain nonzero data and is explicitly not coherent with recently written data: "a call to FSCTL_QUERY_ALLOCATED_RANGES [after writing to a network file] would not necessarily return a correct list of allocated regions. To ensure coherency [...] flush the data to the file" fsx (generic/363) reproduces the resulting corruption against Windows Server 2022: a range is written, an uncached read returns the data, yet the next FSCTL_QUERY_ALLOCATED_RANGES on that range reports it as a whole hole, so the emulation overwrites live data with zeroes. A network trace confirmed the WRITE, the READ returning data and the query returning an empty range list within microseconds. Samba does not exhibit this; its query is coherent with the written data. Write back the dirty pages, drain any outstanding I/O and issue an SMB2 FLUSH to force the server to commit the data before querying the allocated ranges, so the query reflects the data actually present. With this, generic/363 passes against both Windows Server 2022 and Samba over 100000 fsx operations.

Что делать

dpkg-query -W -f='${Package}	${Version}\n'

rpm -qa --qf '%{NAME}\t%{VERSION}-%{RELEASE}\n'

Get-HotFix | Select-Object HotFixID, InstalledOn

Продукты и затронутые версии

{
  "status": "affected",
  "version": "966a3cb7c7db786452a87afdc3b48858fc4d4d6b",
  "lessThan": "f82242fe3109a3ef72f429540b5bdde08fbfb0e4",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "966a3cb7c7db786452a87afdc3b48858fc4d4d6b",
  "lessThan": "bf84e44ff0ed802778eafd7ecb623635379cb506",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "966a3cb7c7db786452a87afdc3b48858fc4d4d6b",
  "lessThan": "aa994489bd835547c191827acc460192e147032d",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "c406bb9ece6ef63721daab106f132ff4b4234e81",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "2f9f4a2d0e6fcf0673ed51195e06e47abe966900",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "5e397c943424de94879830e72c95f2679e297a76",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "5.10.50",
  "lessThan": "5.11",
  "versionType": "semver"
}

{
  "status": "affected",
  "version": "5.12.17",
  "lessThan": "5.13",
  "versionType": "semver"
}

{
  "status": "affected",
  "version": "5.13.2",
  "lessThan": "5.14",
  "versionType": "semver"
}

{
  "status": "affected",
  "version": "5.14"
}

{
  "status": "unaffected",
  "version": "0",
  "lessThan": "5.14",
  "versionType": "semver"
}

{
  "status": "unaffected",
  "version": "6.18.56",
  "versionType": "semver",
  "lessThanOrEqual": "6.18.*"
}

{
  "status": "unaffected",
  "version": "7.2.10",
  "versionType": "semver",
  "lessThanOrEqual": "7.2.*"
}

{
  "status": "unaffected",
  "version": "7.3",
  "versionType": "original_commit_for_fix",
  "lessThanOrEqual": "*"
}

CVSS: оценки и векторы

Оценка CVSS отсутствует.

Источники и ссылки

{
  "cwes": [],
  "epss": {
    "source": "epss",
    "received_at": "2026-11-02T21:15:49.047099+00:00"
  },
  "title": {
    "source": "cve",
    "received_at": "2026-10-28T20:13:06.474690+00:00"
  },
  "scores": [],
  "status": {
    "source": "cve",
    "received_at": "2026-10-28T20:13:06.474690+00:00"
  },
  "affected": [
    "cve"
  ],
  "published": {
    "source": "cve",
    "received_at": "2026-10-28T20:13:06.474690+00:00"
  },
  "solutions": [],
  "percentile": {
    "source": "epss",
    "received_at": "2026-11-02T21:15:49.047099+00:00"
  },
  "references": [
    "cve"
  ],
  "description": {
    "source": "cve",
    "received_at": "2026-10-28T20:13:06.474690+00:00"
  },
  "workarounds": [],
  "configurations": []
}

Хронология записи

1. Данные обновлены03.11.2026, 00:15
2. Данные обновлены02.11.2026, 00:13
3. Данные обновлены31.10.2026, 12:00
4. Данные обновлены29.10.2026, 12:47
5. Опубликована28.10.2026, 23:13

Личная заметка и статус

Другие CVE того же продукта