{
  "cveId": "CVE-2026-64059",
  "url": "https://patchblox.com/security/cve/CVE-2026-64059",
  "summary": "CVE-2026-64059 is fixed in 38 products on 1 platform, first by ALAS2023-2026-1894, released June 22, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  netfs: Fix folio-\u003Eprivate handling in netfs_perf...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  netfs: Fix folio-\u003Eprivate handling in netfs_perform_write()  Under some circumstances, netfs_perform_write() doesn\u0027t correctly manipulate folio-\u003Eprivate between NULL, NETFS_FOLIO_COPY_TO_CACHE, pointing to a group and pointing to a netfs_folio struct, leading to potential multiple attachments of private data with associated folio ref leaks and also leaks of netfs_folio structs or netfs_group refs.  Fix this by consolidating the place at which a folio is marked uptodate in one place and having that look at what\u0027s attached to folio-\u003Eprivate and decide how to clean it up and then set the new group.  Also, the content shouldn\u0027t be flushed if group is NULL, even if a group is specified in the netfs_group parameter, as that would be the case for a new folio.  A filesystem should always specify netfs_group or never specify netfs_group.  The Sashiko auto-review tool noted that it was theoretically possible that the fpos \u003E= ctx-\u003Ezero_point section might leak if it modified a streaming write folio.  This is unlikely, but with a network filesystem, third party changes can happen.  It also pointed out that __netfs_set_group() would leak if called multiple times on the same folio from the \u0022whole folio modify section\u0022.",
  "published": "2026-06-22T09:00:00Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00162,
  "epssPercentile": 0.05383,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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      "product": "bpftool6.12",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.92-122.166.amzn2023",
      "fix": "ALAS2023-2026-1894",
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      "released": "2026-06-22T09:00:00Z"
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      "released": "2026-06-22T09:00:00Z"
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    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}