UnratedFix available
md/raid10: fix divide-by-zero in setup_geo() with zero far_copies
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: md/raid10: fix divide-by-zero in setup_geo() with zero far_copies setup_geo() extracts near_copies (nc) and far_copies (fc) from the user-provided layout parameter without checking for zero. When fc=0 with the "improved" far set layout selected, 'geo->far_set_size = disks / fc' triggers a divide-by-zero. Validate nc and fc immediately after extraction, returning -1 if either is zero.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.258, 5.15.209, 6.1.175, 6.12.88, 6.18.30, 6.6.140, 7.0.7
- CVEs
- CVE-2026-46161
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 20:03 UTC · Revision 1
Source evidence
md/raid10: fix divide-by-zero in setup_geo() with zero far_copies
core-osv · Original sourcePublished 28 May 2026, 09:36 UTC
In the Linux kernel, the following vulnerability has been resolved: md/raid10: fix divide-by-zero in setup_geo() with zero far_copies setup_geo() extracts near_copies (nc) and far_copies (fc) from the user-provided layout parameter without checking for zero. When fc=0 with the "improved" far set layout selected, 'geo->far_set_size = disks / fc' triggers a divide-by-zero. Validate nc and fc immediately after extraction, returning -1 if either is zero.
osv:CVE-2026-46161
Kernel
Fixed versions: 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.88, 6.18.30, 7.0.7
Complete source record
{
"id": "097a3f77555595f6d782d308295954340b9046e48016ac8950d85d9c9a6092c2",
"url": "https://osv.dev/vulnerability/CVE-2026-46161",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "md/raid10: fix divide-by-zero in setup_geo() with zero far_copies",
"summary": "In the Linux kernel, the following vulnerability has been resolved: md/raid10: fix divide-by-zero in setup_geo() with zero far_copies setup_geo() extracts near_copies (nc) and far_copies (fc) from the user-provided layout parameter without checking for zero. When fc=0 with the \"improved\" far set layout selected, 'geo->far_set_size = disks / fc' triggers a divide-by-zero. Validate nc and fc immediately after extraction, returning -1 if either is zero.",
"evidence": "osv:CVE-2026-46161",
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"severity": "unknown",
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"package": {
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"modified": "2026-10-28T02:30:39.068614864Z",
"provider": "osv",
"references": [
"https://cert-portal.siemens.com/productcert/html/ssa-784472.html",
"https://git.kernel.org/stable/c/0b43a70394ce492274e67463326be03e0a9897c5",
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"https://git.kernel.org/stable/c/c716ab3034f84f8a6c226814247b8c5ac9f95da1",
"https://git.kernel.org/stable/c/f9ddb621b2325eb69c95692958daf2bab4dea2c4",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46161.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-46161",
"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/2026/46xxx/CVE-2026-46161.json"
}
},
"related_cves": [
{
"value": "CVE-2026-46161",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 506465,
"published_at": "2026-05-28T09:36:16.428+00:00"
}