UnratedFix available
s390/dasd: Do not complete a failed ESE read as successful
Type: advisorySources: OSV
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.270, 5.15.221, 6.1.188, 6.12.109, 6.18.50, 6.6.157, 7.2.4
- CVEs
- CVE-2026-89458
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 21:32 UTC · Revision 1
Source evidence
s390/dasd: Do not complete a failed ESE read as successful
core-osv · Original sourcePublished 11 Sept 2026, 19:43 UTC
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.
osv:CVE-2026-89458
Kernel
Fixed versions: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4
Complete source record
{
"id": "746524fe6c763a7f04077c565691b3953f5ef915d9cf6e701c21b0ae2c00a688",
"url": "https://osv.dev/vulnerability/CVE-2026-89458",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "s390/dasd: Do not complete a failed ESE read as successful",
"summary": "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.",
"evidence": "osv:CVE-2026-89458",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.10.270",
"evidence": "/affected/1/ranges"
},
{
"value": "5.15.221",
"evidence": "/affected/1/ranges"
},
{
"value": "6.1.188",
"evidence": "/affected/1/ranges"
},
{
"value": "6.6.157",
"evidence": "/affected/1/ranges"
},
{
"value": "6.12.109",
"evidence": "/affected/1/ranges"
},
{
"value": "6.18.50",
"evidence": "/affected/1/ranges"
},
{
"value": "7.2.4",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CVE-2026-89458",
"aliases": [
"CVE-2026-89458"
],
"affected": [
{
"ranges": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"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": "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",
"events": [
{
"introduced": "fbbacd0dcbc3ae9398c569dbea96ae4b5ad97e04"
}
]
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "5f7c9989f11305aaa43e0f4378f4f070022a9f2b"
}
]
}
],
"versions": [
"v5.4.302",
"v5.4.301",
"v5.4.300",
"v5.4.299",
"v5.4.298",
"v5.4.297",
"v5.4.296",
"v5.4.295",
"v5.4.294",
"v5.4.293",
"v5.4.292",
"v5.4.291",
"v5.4.290",
"v5.4.289",
"v5.4.288",
"v5.4.287",
"v5.4.286",
"v5.4.285",
"v5.4.284",
"v5.4.283",
"v5.4.282",
"v5.4.281",
"v5.4.280",
"v5.4.279",
"v5.4.278",
"v5.4.277",
"v5.4.276",
"v5.4.275",
"v5.4.274",
"v5.4.273",
"v5.4.272",
"v5.4.271",
"v5.4.270",
"v5.4.269",
"v5.4.268",
"v5.4.267",
"v5.4.266",
"v5.4.265",
"v5.4.264",
"v5.4.263",
"v5.4.262",
"v5.4.261",
"v5.4.260",
"v5.4.259",
"v5.4.258",
"v5.4.257",
"v5.4.256",
"v5.4.255",
"v5.4.254",
"v5.4.253",
"v5.4.252",
"v5.4.251",
"v5.4.250",
"v5.4.249",
"v5.4.248",
"v5.4.247",
"v5.4.246",
"v5.4.245",
"v5.4.244",
"v5.4.243",
"v5.4.242",
"v5.4.241",
"v5.4.240",
"v5.4.239",
"v5.4.238",
"v5.4.237",
"v5.4.236",
"v5.4.235",
"v5.4.234",
"v5.4.233",
"v5.4.232",
"v5.4.231",
"v5.4.230",
"v5.4.229",
"v5.4.228",
"v5.4.227",
"v5.4.226",
"v5.4.225",
"v5.4.224",
"v5.4.223",
"v5.4.222",
"v5.4.221",
"v5.4.220",
"v5.4.219",
"v5.4.218",
"v5.4.217",
"v5.4.216",
"v5.4.215",
"v5.4.214",
"v5.4.213",
"v5.4.212",
"v5.4.211",
"v5.4.210",
"v5.4.209",
"v5.4.208",
"v5.4.207",
"v5.4.206",
"v5.4.205",
"v5.4.204",
"v5.4.203",
"v5.4.202",
"v5.4.201",
"v5.4.200",
"v5.4.199",
"v5.4.198",
"v5.4.197",
"v5.4.196",
"v5.4.195",
"v5.4.194",
"v5.4.193",
"v5.4.192",
"v5.4.191",
"v5.4.190",
"v5.4.189",
"v5.4.188",
"v5.4.187",
"v5.4.186",
"v5.4.185",
"v5.4.184",
"v5.4.183",
"v5.4.182",
"v5.4.181",
"v5.4.180",
"v5.4.179",
"v5.4.178",
"v5.4.177",
"v5.4.176",
"v5.4.175",
"v5.4.174",
"v5.4.173",
"v5.4.172",
"v5.4.171",
"v5.4.170",
"v5.4.169",
"v5.4.168",
"v5.4.167",
"v5.4.166",
"v5.4.165",
"v5.4.164",
"v5.4.163",
"v5.4.162",
"v5.4.161",
"v5.4.160",
"v5.4.159",
"v5.4.158",
"v5.4.157",
"v5.4.156",
"v5.4.155",
"v5.4.154",
"v5.4.153",
"v5.4.152",
"v5.4.151",
"v5.4.150",
"v5.4.149",
"v5.4.148",
"v5.4.147",
"v5.4.146",
"v5.4.145",
"v5.4.144",
"v5.4.143",
"v5.4.142",
"v5.4.141",
"v5.4.140",
"v5.4.139",
"v5.4.138",
"v5.4.137",
"v5.4.136",
"v5.4.135",
"v5.4.134",
"v5.4.133",
"v5.4.132",
"v5.4.131",
"v5.4.130",
"v5.4.129",
"v5.4.128",
"v5.4.127",
"v5.4.126",
"v5.4.125",
"v5.4.124",
"v5.4.123",
"v5.4.122",
"v5.4.121",
"v5.4.120",
"v5.4.119",
"v5.4.118",
"v5.4.117",
"v5.4.116",
"v5.4.115",
"v5.4.114",
"v5.4.113",
"v5.4.112",
"v5.4.111",
"v5.4.110",
"v5.4.109",
"v5.4.108",
"v5.4.107",
"v5.4.106",
"v5.4.105",
"v5.4.104",
"v5.4.103",
"v5.4.102",
"v5.4.101",
"v5.4.100",
"v5.4.99",
"v5.4.98",
"v5.4.97",
"v5.4.96",
"v5.4.95",
"v5.4.94",
"v5.4.93",
"v5.4.92",
"v5.4.91",
"v5.4.90",
"v5.4.89",
"v5.4.88",
"v5.4.87",
"v5.4.86",
"v5.4.85",
"v5.4.84",
"v5.4.83",
"v5.4.82",
"v5.4.81",
"v5.4.80",
"v5.4.79",
"v5.4.78",
"v5.4.77",
"v5.4.76",
"v5.4.75",
"v5.4.74",
"v5.4.73",
"v5.4.72",
"v5.4.71",
"v5.4.70",
"v5.4.69",
"v5.4.68",
"v5.4.67",
"v5.4.66",
"v5.4.65",
"v5.4.64",
"v5.4.63",
"v5.4.62",
"v5.4.61",
"v5.4.60",
"v5.4.59",
"v5.4.58",
"v5.4.57",
"v5.4.56",
"v5.4.55",
"v5.4.54",
"v5.4.53",
"v5.4.52",
"v5.4.51",
"v5.4.50",
"v5.4.49",
"v5.4.48",
"v5.4.47",
"v5.4.46",
"v5.4.45",
"v5.4.44",
"v5.4.43",
"v5.4.42",
"v5.4.41",
"v5.4.40",
"v5.4.39",
"v5.4.38",
"v5.4.37",
"v5.4.36",
"v5.4.35",
"v5.4.34",
"v5.4.33",
"v5.4.32",
"v5.4.31",
"v5.4.30",
"v5.4.29",
"v5.4.28",
"v5.4.27",
"v5.4.26",
"v5.5.19",
"v5.5.18",
"v5.5.17",
"v5.5.16",
"v5.5.15",
"v5.5.14",
"v5.5.13",
"v5.5.12",
"v5.5.11",
"v5.5.10"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89458.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"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"
}
]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89458.json"
}
}
],
"modified": "2026-10-28T02:30:39.710635999Z",
"provider": "osv",
"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",
"https://git.kernel.org/stable/c/b0d94dd6e82df396e2254c8b0f25eff7d19c2e7f",
"https://git.kernel.org/stable/c/c9adf8399732306dfc97b3adb4778038743e3f5e",
"https://git.kernel.org/stable/c/cddb447c62466f3076938ce120028d7b591f9f37",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89458.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-89458",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89458.json"
}
},
"related_cves": [
{
"value": "CVE-2026-89458",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 507288,
"published_at": "2026-09-11T19:43:21.346+00:00"
}