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s390/dasd: Do not complete a failed ESE read as successful

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: Do not complete a failed ESE read as successful dasd_int_handler() completes an NRF read of an unallocated ESE track by calling ese_read() and unconditionally marking the request DASD_CQR_SUCCESS. dasd_eckd_ese_read() can return an error before it has zeroed the destination buffer: a failed sense-data parse or a current track outside the requested range both return early, leaving the destination pages untouched. The request is still completed successfully, so the block layer is handed stale / uninitialized memory instead of zeros. Check the ese_read() return value and fail the request through the normal error path instead of forcing DASD_CQR_SUCCESS.

Announced Group revision 1
Original source ↗

CVE-2026-89458

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-2026-89458

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": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "8cb96cffceead3cbd0541154d7ecc5e6474edda1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "77168af195d04b34c6de62b874624e74d64cef8d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "921ff697bb6f7067059793becf8b2d00de71ce41",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "55f4df40178cdfede0d7ae848fbab00efa9b95c1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "c9adf8399732306dfc97b3adb4778038743e3f5e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "52b331c99baac653ca794bd8487c8ec4de8db203",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "cddb447c62466f3076938ce120028d7b591f9f37",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fbbacd0dcbc3ae9398c569dbea96ae4b5ad97e04",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5f7c9989f11305aaa43e0f4378f4f070022a9f2b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5.4.26",
        "lessThan": "5.5",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.5.10",
        "lessThan": "5.6",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "drivers/s390/block/dasd.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.6"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.6",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/s390/block/dasd.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89458

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#34992 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-89458 · Revision 1Source updated