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.
CVE-2026-46190
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-46190
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "0257be79fc4a16a3252ce80aa13b3640f728c425",
"lessThan": "231b8e1f604f6e0a7e100536f506cdf482e2c5f5",
"versionType": "git"
},
{
"status": "affected",
"version": "0257be79fc4a16a3252ce80aa13b3640f728c425",
"lessThan": "9a80c458320e0514e11945402dd6e48fcee05524",
"versionType": "git"
},
{
"status": "affected",
"version": "0257be79fc4a16a3252ce80aa13b3640f728c425",
"lessThan": "ca18c180b053f6ce80394322b314ac721c316af7",
"versionType": "git"
},
{
"status": "affected",
"version": "0257be79fc4a16a3252ce80aa13b3640f728c425",
"lessThan": "34bdcfb496b29f9a52431194f94473b37fb8c162",
"versionType": "git"
},
{
"status": "affected",
"version": "0257be79fc4a16a3252ce80aa13b3640f728c425",
"lessThan": "c0b654bc0b76a1da102d9138be1ed1223bd99310",
"versionType": "git"
},
{
"status": "affected",
"version": "0257be79fc4a16a3252ce80aa13b3640f728c425",
"lessThan": "e47029b977e747cb3a9174308fd55762cce70147",
"versionType": "git"
}
],
"programFiles": [
"drivers/mtd/spi-nor/debugfs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.176",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.140",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.88",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.30",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.7",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/mtd/spi-nor/debugfs.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46190
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #28406 · Revision 1
- Added to Heist Feed
- Publisher date