GHSA-F5HQ-62QQ-FGRW

Vulnerability from github – Published: 2026-04-03 18:31 – Updated: 2026-07-14 15:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

mtd: rawnand: serialize lock/unlock against other NAND operations

nand_lock() and nand_unlock() call into chip->ops.lock_area/unlock_area without holding the NAND device lock. On controllers that implement SET_FEATURES via multiple low-level PIO commands, these can race with concurrent UBI/UBIFS background erase/write operations that hold the device lock, resulting in cmd_pending conflicts on the NAND controller.

Add nand_get_device()/nand_release_device() around the lock/unlock operations to serialize them against all other NAND controller access.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-23434"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-03T16:16:24Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: rawnand: serialize lock/unlock against other NAND operations\n\nnand_lock() and nand_unlock() call into chip-\u003eops.lock_area/unlock_area\nwithout holding the NAND device lock. On controllers that implement\nSET_FEATURES via multiple low-level PIO commands, these can race with\nconcurrent UBI/UBIFS background erase/write operations that hold the\ndevice lock, resulting in cmd_pending conflicts on the NAND controller.\n\nAdd nand_get_device()/nand_release_device() around the lock/unlock\noperations to serialize them against all other NAND controller access.",
  "id": "GHSA-f5hq-62qq-fgrw",
  "modified": "2026-07-14T15:31:45Z",
  "published": "2026-04-03T18:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23434"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/28ea836cc44cb8b89c1c174707ead0c1133c60e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5fd5c078af23cb353507aa522e09d557d7eaef04"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a80291e577b44593a724d6cd64c14337c78f194d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bab2bc6e850a697a23b9e5f0e21bb8c187615e95"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce5229e78078e437704157eb542f43a6f83b429b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f25446e2c28939753d3b62d34dfda49952b2557d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f71ce0ae5aefe39dd5b2f996c0e08550d2153ad2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe4a73c3dd48308149d57a10c2761e1d36ced7ba"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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