CVE-2026-46190

Summary

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.

Impact & exploitability

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/34bdcfb496b29f9a52431194f94473b37fb8c162 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/34bdcfb496b29f9a52431194f94473b37fb8c162Patch
• https://git.kernel.org/stable/c/9a80c458320e0514e11945402dd6e48fcee05524Patch
• https://git.kernel.org/stable/c/c0b654bc0b76a1da102d9138be1ed1223bd99310Patch
• https://git.kernel.org/stable/c/ca18c180b053f6ce80394322b314ac721c316af7Patch
• https://git.kernel.org/stable/c/e47029b977e747cb3a9174308fd55762cce70147Patch
• https://git.kernel.org/stable/c/231b8e1f604f6e0a7e100536f506cdf482e2c5f5