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ksmbd: prevent out-of-bounds reads in share config responses

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds reads in share config responses Validate IPC share configuration payload sizes before consuming variable-length fields. Bound veto list parsing and account for the separator byte when deriving the path length.

Announced Group revision 1
Original source ↗

CVE-2026-89792

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-2026-89792

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": "88b7f1143b15b29cccb8392b4f38e75b7bb3e300",
        "lessThan": "df8aa4a09733c4d3974b1db32c1782b3aad3a151",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "51a6c2af9d20203ddeeaf73314ba8854b38d01bd",
        "lessThan": "0127f1c119bde40578f4d25f5d17333b4e75de8c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a637fabac554270a851033f5ab402ecb90bc479c",
        "lessThan": "fd636a87161def6e35876ab7943641ce457974c8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a677ebd8ca2f2632ccdecbad7b87641274e15aac",
        "lessThan": "ffa507f5f774cb4d45136b106989ebc051361263",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a677ebd8ca2f2632ccdecbad7b87641274e15aac",
        "lessThan": "cd2bcee450bc94770be56c0b896c1a1dc6838bd8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a677ebd8ca2f2632ccdecbad7b87641274e15aac",
        "lessThan": "61a8d06600c8c397f9a7e01940479d4c94a82f5f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "a677ebd8ca2f2632ccdecbad7b87641274e15aac",
        "lessThan": "f25e93768fcc5d8287e50b1ec52a42e4c276df34",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "76af689a45aa44714b46d1a7de4ffdf851ded896",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5.15.157",
        "lessThan": "5.15.222",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.1.85",
        "lessThan": "6.1.189",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.6.26",
        "lessThan": "6.6.158",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.8.5",
        "lessThan": "6.9",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "fs/smb/server/mgmt/share_config.c",
      "fs/smb/server/transport_ipc.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.9"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.9",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.111",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/smb/server/mgmt/share_config.c",
      "fs/smb/server/transport_ipc.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89792

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#36262 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-89792 · Revision 1Source updated