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vuln-cve/data/2026/46xxx/CVE-2026-46190.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-46190",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-05-13T15:03:33.104Z",
"datePublished": "2026-05-28T09:36:44.017Z",
"dateUpdated": "2026-10-15T01:21:11.983Z"
},
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"shortName": "Linux",
"dateUpdated": "2026-08-05T12:30:19.706Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()\n\nSashiko noticed an out-of-bounds read [1].\n\nIn spi_nor_params_show(), the snor_f_names array is passed to\nspi_nor_print_flags() using sizeof(snor_f_names).\n\nSince snor_f_names is an array of pointers, sizeof() returns the total\nnumber of bytes occupied by the pointers\n\t(element_count * sizeof(void *))\nrather than the element count itself. On 64-bit systems, this makes the\npassed length 8x larger than intended.\n\nInside spi_nor_print_flags(), the 'names_len' argument is used to\nbounds-check the 'names' array access. An out-of-bounds read occurs\nif a flag bit is set that exceeds the array's actual element count\nbut is within the inflated byte-size count.\n\nCorrect this by using ARRAY_SIZE() to pass the actual number of\nstring pointers in the array."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"baseScore": 7.1,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The vulnerable code is a debugfs `params` file (mode 0444) under CONFIG_DEBUG_FS, reachable only by a local VFS read of /sys/kernel/debug/spi-nor/<dev>/params; there is no network or physical path.\nAC:L - While the read itself is reliable, the OOB only manifests if a flag bit ≥17 is set in nor->flags; per the directive to consider the most severe reasonable case and resolve uncertainty toward higher severity, the read is treated as reliably performable.\nPR:L - The file is created world-readable (0444), and on reasonable embedded/dev SPI-NOR deployments where debugfs is mounted and traversable by non-root, an unprivileged local user can read it.\nUI:N - Exploitation only requires the attacker to read the debugfs file; no victim action is needed.\nS:U - The defect is confined to the kernel's own memory and security authority with no crossing of a trust boundary such as VM or IOMMU.\nC:H - An out-of-bounds read that, when triggered, makes seq_puts() dereference an adjacent-memory-derived pointer and emit a kernel string into readable output — not strictly bounded to a few bytes.\nI:N - The operation is purely a read path emitting to a seq_file; it provides no memory-write or control-flow primitive.\nA:H - If the out-of-array slot holds a non-NULL invalid pointer, seq_puts() dereferences a wild pointer, which can oops/crash the kernel."
}
]
}
],
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{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/mtd/spi-nor/debugfs.c"
],
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
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],
"versions": [
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"status": "affected"
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{
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"status": "unaffected",
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{
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"lessThanOrEqual": "6.1.*",
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},
{
"version": "7.1",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"references": [
{
"url": "https://git.kernel.org/stable/c/231b8e1f604f6e0a7e100536f506cdf482e2c5f5"
},
{
"url": "https://git.kernel.org/stable/c/9a80c458320e0514e11945402dd6e48fcee05524"
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{
"url": "https://git.kernel.org/stable/c/ca18c180b053f6ce80394322b314ac721c316af7"
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"url": "https://git.kernel.org/stable/c/c0b654bc0b76a1da102d9138be1ed1223bd99310"
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{
"url": "https://git.kernel.org/stable/c/e47029b977e747cb3a9174308fd55762cce70147"
}
],
"title": "mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()",
"x_generator": {
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"dateUpdated": "2026-10-15T01:21:11.983Z"
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"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
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}
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