Linux Kernel spi-nor: spi_nor_params_show OOB Read Bug Fix
CVE-2026-46190 Published on May 28, 2026
mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()
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.
Products Associated with CVE-2026-46190
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version 0257be79fc4a16a3252ce80aa13b3640f728c425 and below 9a80c458320e0514e11945402dd6e48fcee05524 is affected.
- Version 0257be79fc4a16a3252ce80aa13b3640f728c425 and below ca18c180b053f6ce80394322b314ac721c316af7 is affected.
- Version 0257be79fc4a16a3252ce80aa13b3640f728c425 and below 34bdcfb496b29f9a52431194f94473b37fb8c162 is affected.
- Version 0257be79fc4a16a3252ce80aa13b3640f728c425 and below c0b654bc0b76a1da102d9138be1ed1223bd99310 is affected.
- Version 0257be79fc4a16a3252ce80aa13b3640f728c425 and below e47029b977e747cb3a9174308fd55762cce70147 is affected.
- Version 5.19 is affected.
- Before 5.19 is unaffected.
- Version 6.6.140, <= 6.6.* is unaffected.
- Version 6.12.88, <= 6.12.* is unaffected.
- Version 6.18.30, <= 6.18.* is unaffected.
- Version 7.0.7, <= 7.0.* is unaffected.
- Version 7.1-rc2, <= * is unaffected.