mtd: rawnand: validate ONFI extended parameter page sections
In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: validate ONFI extended parameter page sections nand_flash_detect_ext_param_page() allocates the length declared by the ONFI parameter page, then treats the data as a fixed header followed by variable-length sections. It reads that header and advances over sections without first proving that the fixed page and each current section fit in the allocation. Reject pages shorter than the fixed header, track the remaining variable area while walking sections, and require the ECC section to contain every field read from struct onfi_ext_ecc_info. Use device-scoped diagnostics that identify the malformed ONFI section.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.270, 5.15.221, 6.1.188, 6.12.110, 6.18.51, 6.6.157, 7.2.5
- CVEs
- CVE-2026-89952
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 8 Nov 2026, 00:35 UTC · Revision 1
Source evidence
mtd: rawnand: validate ONFI extended parameter page sections
core-osv · Original sourcePublished 16 Sept 2026, 10:32 UTC
In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: validate ONFI extended parameter page sections nand_flash_detect_ext_param_page() allocates the length declared by the ONFI parameter page, then treats the data as a fixed header followed by variable-length sections. It reads that header and advances over sections without first proving that the fixed page and each current section fit in the allocation. Reject pages shorter than the fixed header, track the remaining variable area while walking sections, and require the ECC section to contain every field read from struct onfi_ext_ecc_info. Use device-scoped diagnostics that identify the malformed ONFI section.
osv:CVE-2026-89952
Kernel
Fixed versions: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5
Complete source record
{
"id": "f98eb36d36c95a8e215092cfb61852a695ff2f25abc5f7f17e2fbe899e52cc31",
"url": "https://osv.dev/vulnerability/CVE-2026-89952",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "mtd: rawnand: validate ONFI extended parameter page sections",
"summary": "In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: validate ONFI extended parameter page sections nand_flash_detect_ext_param_page() allocates the length declared by the ONFI parameter page, then treats the data as a fixed header followed by variable-length sections. It reads that header and advances over sections without first proving that the fixed page and each current section fit in the allocation. Reject pages shorter than the fixed header, track the remaining variable area while walking sections, and require the ECC section to contain every field read from struct onfi_ext_ecc_info. Use device-scoped diagnostics that identify the malformed ONFI section.",
"evidence": "osv:CVE-2026-89952",
"products": [
{
"name": {
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"evidence": "/affected/1/package/name"
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"evidence": "/affected/1/ranges"
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{
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"evidence": "/affected/1/ranges"
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{
"value": "6.1.188",
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{
"value": "6.6.157",
"evidence": "/affected/1/ranges"
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{
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"evidence": "/affected/1/ranges"
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{
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"evidence": "/affected/1/ranges"
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{
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"severity": "unknown",
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"aliases": [
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"package": {
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"ecosystem": "Linux"
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"database_specific": {
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"modified": "2026-10-28T02:30:52.268697540Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/12a63a0f0d17b2d26211b2524ded91a67dd5c99c",
"https://git.kernel.org/stable/c/1bf148fabe6463422195b7cc43b3412533f1dc21",
"https://git.kernel.org/stable/c/23e747fe585830c43095c37c85b2757231c6917f",
"https://git.kernel.org/stable/c/86948f81964e40cd6472d76a6371e4f297d84db0",
"https://git.kernel.org/stable/c/c7df90bbda71549bfd981bf478ad04ddfccf4e0d",
"https://git.kernel.org/stable/c/c8f86e375b39cada09fd8cb33dd3bb3641e84a62",
"https://git.kernel.org/stable/c/ddb6ddf5be7429bb98b3368c883be51f00b31678",
"https://git.kernel.org/stable/c/e5e415262330bd70f983e091d8919d9dcd99e475",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89952.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-89952",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89952.json"
}
},
"related_cves": [
{
"value": "CVE-2026-89952",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 521012,
"published_at": "2026-09-16T10:32:36.91+00:00"
}