CVE-2026-46190
Analyzed
Analyzed - Analysis Complete
Out-of-Bounds Read in Linux Kernel MTD SPI-NOR Debugfs
Publication date: 2026-05-28
Last updated on: 2026-06-11
Assigner: kernel.org
Description
Description
In the Linux kernel, the following vulnerability has been resolved:
mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()
Sashiko noticed an out-of-bounds read [1].
In spi_nor_params_show(), the snor_f_names array is passed to
spi_nor_print_flags() using sizeof(snor_f_names).
Since snor_f_names is an array of pointers, sizeof() returns the total
number of bytes occupied by the pointers
(element_count * sizeof(void *))
rather than the element count itself. On 64-bit systems, this makes the
passed length 8x larger than intended.
Inside spi_nor_print_flags(), the 'names_len' argument is used to
bounds-check the 'names' array access. An out-of-bounds read occurs
if a flag bit is set that exceeds the array's actual element count
but is within the inflated byte-size count.
Correct this by using ARRAY_SIZE() to pass the actual number of
string pointers in the array.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | 7.1 |
| linux | linux_kernel | From 6.13 (inc) to 6.18.30 (exc) |
| linux | linux_kernel | From 6.19 (inc) to 7.0.7 (exc) |
| linux | linux_kernel | From 6.7 (inc) to 6.12.88 (exc) |
| linux | linux_kernel | From 5.19 (inc) to 6.6.140 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-125 | The product reads data past the end, or before the beginning, of the intended buffer. |
