{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5e6bdd37c5526ef01326df5dabb93011ee89237e"
            },
            {
              "fixed": "8cb96cffceead3cbd0541154d7ecc5e6474edda1"
            },
            {
              "fixed": "77168af195d04b34c6de62b874624e74d64cef8d"
            },
            {
              "fixed": "921ff697bb6f7067059793becf8b2d00de71ce41"
            },
            {
              "fixed": "55f4df40178cdfede0d7ae848fbab00efa9b95c1"
            },
            {
              "fixed": "c9adf8399732306dfc97b3adb4778038743e3f5e"
            },
            {
              "fixed": "52b331c99baac653ca794bd8487c8ec4de8db203"
            },
            {
              "fixed": "b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f"
            },
            {
              "fixed": "cddb447c62466f3076938ce120028d7b591f9f37"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "fbbacd0dcbc3ae9398c569dbea96ae4b5ad97e04"
            },
            {
              "last_affected": "5f7c9989f11305aaa43e0f4378f4f070022a9f2b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.4.26"
            },
            {
              "fixed": "5.5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.5.10"
            },
            {
              "fixed": "5.6"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.6.0"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.109"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89458.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/dasd: Do not complete a failed ESE read as successful\n\ndasd_int_handler() completes an NRF read of an unallocated ESE track by\ncalling ese_read() and unconditionally marking the request\nDASD_CQR_SUCCESS. dasd_eckd_ese_read() can return an error before it has\nzeroed the destination buffer: a failed sense-data parse or a current\ntrack outside the requested range both return early, leaving the\ndestination pages untouched. The request is still completed successfully,\nso the block layer is handed stale / uninitialized memory instead of\nzeros.\n\nCheck the ese_read() return value and fail the request through the normal\nerror path instead of forcing DASD_CQR_SUCCESS.",
  "id": "CVE-2026-89458",
  "modified": "2026-09-16T03:30:27.090810098Z",
  "published": "2026-09-11T19:43:21.346Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/52b331c99baac653ca794bd8487c8ec4de8db203"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55f4df40178cdfede0d7ae848fbab00efa9b95c1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77168af195d04b34c6de62b874624e74d64cef8d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8cb96cffceead3cbd0541154d7ecc5e6474edda1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/921ff697bb6f7067059793becf8b2d00de71ce41"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c9adf8399732306dfc97b3adb4778038743e3f5e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cddb447c62466f3076938ce120028d7b591f9f37"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89458.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89458"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "s390/dasd: Do not complete a failed ESE read as successful"
}