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smb: client: close completed creates on compound wait errors

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: smb: client: close completed creates on compound wait errors compound_send_recv() waits for responses in order. If a later wait is interrupted, or if a later MID fails during response synchronization, an earlier CREATE may already have opened a remote handle. The earlier mid is then released without invoking handle_cancelled_mid(), leaving the remote handle open because no FID was copied to the caller. Mark completed earlier mids as cancelled when a compound wait or MID synchronization aborts. Keep their response buffers attached while the MIDs are synchronized, and transfer them only after synchronization of the processed responses, so the release path can inspect successful CREATE responses and queue SMB2_close() after a later failure. Account for a remote open only after the close work is allocated and before it is queued, since the caller has not yet updated num_remote_opens. Mark the create+close compound used by smb2_unlink() so it is not closed again. Non-CREATE responses and compounds that already include a close keep their existing behavior.

Announced Source revision 1
Original source ↗

CVE-2026-98450

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98450

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "e0bba0b8548179b696e86c158ea8f45f2ef6ad14",
        "lessThan": "8afc80156b1d9e2cfd02d42c255305fad95b59fc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e0bba0b8548179b696e86c158ea8f45f2ef6ad14",
        "lessThan": "2cb07d1a6a30283dbfc809c8036bc1fd103d59fa",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e0bba0b8548179b696e86c158ea8f45f2ef6ad14",
        "lessThan": "224b56b7c02b2bfb1f5bee18d5f56ae6b052be44",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e0bba0b8548179b696e86c158ea8f45f2ef6ad14",
        "lessThan": "253612499ce9b4cd7bb922fe507ec204bddd9313",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e0bba0b8548179b696e86c158ea8f45f2ef6ad14",
        "lessThan": "6c5c547f037bc18f0b8d0b5db5a648f8f630ce85",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/smb/client/smb2inode.c",
      "fs/smb/client/smb2misc.c",
      "fs/smb/client/transport.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.19"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.19",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.113",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.56",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.9",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/smb/client/smb2inode.c",
      "fs/smb/client/smb2misc.c",
      "fs/smb/client/transport.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98450

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#48880 · Revision 1
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Publisher date
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