HighFix available

mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()

Type: advisorySources: OSV

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: Kernel
Affected versions: Not specified
Fixed versions: 6.1.176, 6.12.88, 6.18.30, 6.6.140, 7.0.7
CVEs: CVE-2026-46190
Confirmed fixed CVEs: Not specified
Updated in this feed: 3 Nov 2026, 05:34 UTC · Revision 1

Source evidence

mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()

core-osv · Original source

Published 28 May 2026, 09:36 UTC

osv:CVE-2026-46190

Kernel

Fixed versions: 6.1.176, 6.6.140, 6.12.88, 6.18.30, 7.0.7

Complete source record

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      "modified": "2026-10-28T02:30:26.473003466Z",
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  "source_id": "core-osv",
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