{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-46190",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-46190"
  ],
  "published": "2026-05-28T09:36:53Z",
  "summary": "mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()\n\nSashiko noticed an out-of-bounds read [1].\n\nIn spi_nor_params_show(), the snor_f_names array is passed to\nspi_nor_print_flags() using sizeof(snor_f_names).\n\nSince snor_f_names is an array of pointers, sizeof() returns the total\nnumber of bytes occupied by the pointers\n\t(element_count * sizeof(void *))\nrather than the element count itself. On 64-bit systems, this makes the\npassed length 8x larger than intended.\n\nInside spi_nor_print_flags(), the 'names_len' argument is used to\nbounds-check the 'names' array access. An out-of-bounds read occurs\nif a flag bit is set that exceeds the array's actual element count\nbut is within the inflated byte-size count.\n\nCorrect this by using ARRAY_SIZE() to pass the actual number of\nstring pointers in the array.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"
    }
  ],
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-46190"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/231b8e1f604f6e0a7e100536f506cdf482e2c5f5"
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    "upstream_modified": "2026-08-05T13:16:28Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.1,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The vulnerable code is a debugfs `params` file (mode 0444) under CONFIG_DEBUG_FS, reachable only by a local VFS read of /sys/kernel/debug/spi-nor/<dev>/params; there is no network or physical path.\nAC:L - While the read itself is reliable, the OOB only manifests if a flag bit \u226517 is set in nor->flags; per the directive to consider the most severe reasonable case and resolve uncertainty toward higher severity, the read is treated as reliably performable.\nPR:L - The file is created world-readable (0444), and on reasonable embedded/dev SPI-NOR deployments where debugfs is mounted and traversable by non-root, an unprivileged local user can read it.\nUI:N - Exploitation only requires the attacker to read the debugfs file; no victim action is needed.\nS:U - The defect is confined to the kernel's own memory and security authority with no crossing of a trust boundary such as VM or IOMMU.\nC:H - An out-of-bounds read that, when triggered, makes seq_puts() dereference an adjacent-memory-derived pointer and emit a kernel string into readable output \u2014 not strictly bounded to a few bytes.\nI:N - The operation is purely a read path emitting to a seq_file; it provides no memory-write or control-flow primitive.\nA:H - If the out-of-array slot holds a non-NULL invalid pointer, seq_puts() dereferences a wild pointer, which can oops/crash the kernel."
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}