{
  "cveId": "CVE-2026-90149",
  "url": "https://patchblox.com/security/cve/CVE-2026-90149",
  "summary": "CVE-2026-90149 is fixed in 35 products on 1 platform, first by DEBIAN-CVE-2026-90149, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  NFSv4/flexfiles: fix NULL dereference for NFSv4....",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  NFSv4/flexfiles: fix NULL dereference for NFSv4.0 data servers  flexfiles accepts NFSv4.0 data servers, but two NFSv4 code paths assume the data server client has a session. Unlike NFSv4.1\u002B, an NFSv4.0 client has no session (clp-\u003Ecl_session is NULL; it uses clp-\u003Ecl_slot_tbl), so I/O to a v4.0 flexfiles DS oopses:    - nfs4_init_ds_session() dereferences clp-\u003Ecl_session-\u003Esession_state     while seeding the DS lease. It also only seeds cl_lease_time when     NFS4_SESSION_INITING is set; without a session that never happens, so     cl_lease_time stays 0 and nfs4_renew_state() busy-loops, requeuing     every 5 seconds. Seed the lease whenever there is no session and     return before touching session state.    - ff_layout_async_handle_error_v4() dereferences     clp-\u003Ecl_session-\u003Efc_slot_table on every DS I/O error. Fall back to the     v4.0 transport slot table (clp-\u003Ecl_slot_tbl) when there is no session.",
  "published": "2026-09-17T17:17:07Z",
  "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": 0.00665,
  "epssPercentile": 0.52011,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.54-121.166.amzn2023",
      "fix": "ALAS2023-2026-3192",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3192",
      "released": "2026-11-07T01:06:07Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}