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md/raid10: fix divide-by-zero in setup_geo() with zero far_copies

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-46161

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-2026-46161

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": "475901aff15841fb0a81e7546517407779a9b061",
        "lessThan": "0b43a70394ce492274e67463326be03e0a9897c5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "475901aff15841fb0a81e7546517407779a9b061",
        "lessThan": "c716ab3034f84f8a6c226814247b8c5ac9f95da1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "475901aff15841fb0a81e7546517407779a9b061",
        "lessThan": "553e32adfa1a96b217651139a3f8c3b92b9984ac",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "475901aff15841fb0a81e7546517407779a9b061",
        "lessThan": "4af2e558e6fdfb972c61350653fd55d1f62b60a5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "475901aff15841fb0a81e7546517407779a9b061",
        "lessThan": "9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cda",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "475901aff15841fb0a81e7546517407779a9b061",
        "lessThan": "913d556e4bd1b56ed822815655b82c7bb54edc51",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "475901aff15841fb0a81e7546517407779a9b061",
        "lessThan": "f9ddb621b2325eb69c95692958daf2bab4dea2c4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "475901aff15841fb0a81e7546517407779a9b061",
        "lessThan": "9aa6d860b0930e2f72795665c42c44252a558a0c",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/md/raid10.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.9"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.9",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.258",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.209",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.175",
        "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/md/raid10.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-46161

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#28398 · Revision 1
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Publisher date
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