CVE-2026-46190 (GCVE-0-2026-46190)
Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-08-05 12:30
VLAI
EPSS
VEX
Title
mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()
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.
Severity
7.1 (High)
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
0257be79fc4a16a3252ce80aa13b3640f728c425 , < 231b8e1f604f6e0a7e100536f506cdf482e2c5f5
(git)
Affected: 0257be79fc4a16a3252ce80aa13b3640f728c425 , < 9a80c458320e0514e11945402dd6e48fcee05524 (git) Affected: 0257be79fc4a16a3252ce80aa13b3640f728c425 , < ca18c180b053f6ce80394322b314ac721c316af7 (git) Affected: 0257be79fc4a16a3252ce80aa13b3640f728c425 , < 34bdcfb496b29f9a52431194f94473b37fb8c162 (git) Affected: 0257be79fc4a16a3252ce80aa13b3640f728c425 , < c0b654bc0b76a1da102d9138be1ed1223bd99310 (git) Affected: 0257be79fc4a16a3252ce80aa13b3640f728c425 , < e47029b977e747cb3a9174308fd55762cce70147 (git) |
guessed | |
| Linux | Linux |
Affected:
5.19
Unaffected: 0 , < 5.19 (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
{
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{
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"version": "6.12.88",
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},
{
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"version": "6.18.30",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"version": "7.0.7",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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},
{
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},
{
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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 \u0027names_len\u0027 argument is used to\nbounds-check the \u0027names\u0027 array access. An out-of-bounds read occurs\nif a flag bit is set that exceeds the array\u0027s 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": {
"baseScore": 7.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
},
"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/\u003cdev\u003e/params; there is no network or physical path.\nAC:L - While the read itself is reliable, the OOB only manifests if a flag bit \u226517 is set in nor-\u003eflags; 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\u0027s 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 \u2014 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."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T12:30:19.706Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/231b8e1f604f6e0a7e100536f506cdf482e2c5f5"
},
{
"url": "https://git.kernel.org/stable/c/9a80c458320e0514e11945402dd6e48fcee05524"
},
{
"url": "https://git.kernel.org/stable/c/ca18c180b053f6ce80394322b314ac721c316af7"
},
{
"url": "https://git.kernel.org/stable/c/34bdcfb496b29f9a52431194f94473b37fb8c162"
},
{
"url": "https://git.kernel.org/stable/c/c0b654bc0b76a1da102d9138be1ed1223bd99310"
},
{
"url": "https://git.kernel.org/stable/c/e47029b977e747cb3a9174308fd55762cce70147"
}
],
"title": "mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()",
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"cveId": "CVE-2026-46190",
"datePublished": "2026-05-28T09:36:44.017Z",
"dateReserved": "2026-05-13T15:03:33.104Z",
"dateUpdated": "2026-08-05T12:30:19.706Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-46190",
"date": "2026-09-16",
"epss": "0.00131",
"percentile": "0.03083"
},
"microsoft_vex": {
"current_release_date": "2026-06-09T14:41:52.000Z",
"cve": "CVE-2026-46190",
"id": "msrc_CVE-2026-46190",
"initial_release_date": "2026-05-02T00:00:00.000Z",
"product_status:fixed": "1",
"product_status:known_affected": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46190.json",
"version": "3"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-46190\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-28T10:16:34.640\",\"lastModified\":\"2026-06-19T13:16:34.860\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"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 \u0027names_len\u0027 argument is used to\\nbounds-check the \u0027names\u0027 array access. An out-of-bounds read occurs\\nif a flag bit is set that exceeds the array\u0027s 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 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16baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-05T14:45:26+00:00",
"cve": "CVE-2026-46190",
"id": "CVE-2026-46190",
"initial_release_date": "2026-05-28T00:00:00+00:00",
"product_status:known_affected": "76",
"product_status:known_not_affected": "198",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46190.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T01:11:22Z",
"cve": "CVE-2026-46190",
"id": "CVE-2026-46190",
"initial_release_date": "2026-05-29T01:15:29Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "436",
"product_status:known_not_affected": "296",
"product_status:recommended": "232",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-46190",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46190.json",
"version": "9"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
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