{"cve":"CVE-2026-89458","nvd":{"published":"2026-09-11T20:19:26.657","modified":"2026-10-19T09:17:38.187","status":"Received","description":"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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/52b331c99baac653ca794bd8487c8ec4de8db203","https://git.kernel.org/stable/c/55f4df40178cdfede0d7ae848fbab00efa9b95c1","https://git.kernel.org/stable/c/77168af195d04b34c6de62b874624e74d64cef8d","https://git.kernel.org/stable/c/8cb96cffceead3cbd0541154d7ecc5e6474edda1","https://git.kernel.org/stable/c/921ff697bb6f7067059793becf8b2d00de71ce41"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-89458","score":0.00177,"percentile":0.07147,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}