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s390/dasd: Propagate partial completion length across ERP recovery

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: Propagate partial completion length across ERP recovery dasd_default_erp_postaction() copies the timing and device state from the finished ERP request back to the original request but drops proc_bytes. A request that was partially completed, an ESE read of a not-yet-allocated track returns fewer bytes than requested, and then recovered through the ERP chain loses its partial-completion length. __dasd_cleanup_cqr() then sees proc_bytes == 0 and completes the whole request instead of requeueing the remainder, silently returning zeroed data for the part that was never read. Carry proc_bytes over to the original request like the other per-request state.

Announced Source revision 1
Original source ↗

CVE-2026-89456

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-2026-89456

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": "9e063165d3fe58db2a517717b830f17e82d03467",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "6b0954c8a259da1e4aa745989f82723947acfb46",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "d0a2f97d8c97134aa7f6a191940b7bab4bb42f5f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "f735b9710f0c8fe72c1060103e865f4ae678190b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "d6b8778b1b82aa3a8dbf8612080f635b834bd16b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "ceafb262475ac6cb3a7d07b1102608be2b216b99",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "15ec03452c18e8d288e519837d21b308300d74b2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
        "lessThan": "6fb5ba2e7e43173a3761e46f091070a8185efa14",
        "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_erp.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_erp.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89456

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#34988 · Revision 1
Added to Heist Feed
Publisher date
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