{
  "cveId": "CVE-2026-89971",
  "url": "https://patchblox.com/security/cve/CVE-2026-89971",
  "summary": "CVE-2026-89971 is fixed in 74 products on 1 platform, first by DEBIAN-CVE-2026-89971, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "nvme: skip the zoned limits update if the zone info query failed",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  nvme: skip the zoned limits update if the zone info query failed  nvme_query_zone_info() returns either a negative errno or a positive NVMe status code, but nvme_update_ns_info_block() only tests for the negative case:  \tret = nvme_query_zone_info(ns, lbaf, \u0026zi); \tif (ret \u003C 0) \t\tgoto out;  If the device fails the Identify Namespace (I/O Command Set specific) command, or the Identify Controller command issued by nvme_set_max_append(), the positive status falls through and setup continues with the zero-initialized zone info.  nvme_update_zone_info() then marks the queue zoned with chunk_sectors and ns-\u003Ehead-\u003Ezsze set to zero.  blk_validate_zoned_limits() does not check chunk_sectors, so the limits commit succeeds.  blk_revalidate_disk_zones() does reject the zero zone size, but by then the limits are live and nothing rolls them back, so I/O keeps being submitted to a zoned queue with a zero zone size and disk_zone_no() shifts by ilog2(0):    nvme0n1: Invalid non power of two zone size (0)   UBSAN: shift-out-of-bounds in include/linux/blkdev.h:747:16   shift exponent -1 is negative    disk_zone_no include/linux/blkdev.h:747 [inline]    bio_straddles_zones include/linux/blkdev.h:1058 [inline]    blk_zone_wplug_handle_write block/blk-zoned.c:1423 [inline]    blk_zone_plug_bio.cold\u002B0x25/0x1c8 block/blk-zoned.c:1605    blk_mq_submit_bio\u002B0x18fb/0x2870 block/blk-mq.c:3196    submit_bh_wbc\u002B0x575/0x740 fs/buffer.c:2824    __block_write_full_folio\u002B0x728/0xdd0 fs/buffer.c:1933  Any device, firmware or NVMe-oF target that fails this one command reaches this.  Skip the zoned limits update in that case, and log which of the two things happened: during a revalidation the queue keeps the zone geometry it was last validated with, and on a first scan the namespace is registered without zoned limits, so that it is still available as a handle for admin commands.  Neither of the paths in nvme_query_zone_info() that return a positive status logs anything, so the failure would otherwise be silent.  zi.zone_size is an exact indicator: every path that returns a positive status returns before it is assigned, and after that the only failure left is -ENODEV, which the caller already handles.  Found by FuzzNvme.",
  "published": "2026-09-16T11:17:07Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00612,
  "epssPercentile": 0.49555,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89971",
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  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}