UnratedFix available

md/md-llbitmap: skip reading rdevs that are not in_sync

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: md/md-llbitmap: skip reading rdevs that are not in_sync When reading bitmap pages from member disks, the code iterates through all rdevs and attempts to read from the first available one. However, it only checks for raid_disk assignment and Faulty flag, missing the In_sync flag check. This can cause bitmap data to be read from spare disks that are still being rebuilt and don't have valid bitmap information yet. Reading stale or uninitialized bitmap data from such disks can lead to incorrect dirty bit tracking, potentially causing data corruption during recovery or normal operation. Add the In_sync flag check to ensure bitmap pages are only read from fully synchronized member disks that have valid bitmap data.

Products: Kernel
Affected versions: Not specified
Fixed versions: 6.18.27, 7.0.4
CVEs: CVE-2026-46045
Confirmed fixed CVEs: Not specified
Updated in this feed: 6 Nov 2026, 03:16 UTC · Revision 1

Source evidence

md/md-llbitmap: skip reading rdevs that are not in_sync

core-osv · Original source

Published 27 May 2026, 12:57 UTC

osv:CVE-2026-46045

Kernel

Fixed versions: 6.18.27, 7.0.4

Complete source record

{
  "id": "fb5316f3cc921b1ac0bc24128a9f63ac73a6b132c0573da5b87b5f16167cda61",
  "url": "https://osv.dev/vulnerability/CVE-2026-46045",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "md/md-llbitmap: skip reading rdevs that are not in_sync",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: md/md-llbitmap: skip reading rdevs that are not in_sync When reading bitmap pages from member disks, the code iterates through all rdevs and attempts to read from the first available one. However, it only checks for raid_disk assignment and Faulty flag, missing the In_sync flag check. This can cause bitmap data to be read from spare disks that are still being rebuilt and don't have valid bitmap information yet. Reading stale or uninitialized bitmap data from such disks can lead to incorrect dirty bit tracking, potentially causing data corruption during recovery or normal operation. Add the In_sync flag check to ensure bitmap pages are only read from fully synchronized member disks that have valid bitmap data.",
    "evidence": "osv:CVE-2026-46045",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.27",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.0.4",
            "evidence": "/affected/1/ranges"
          }
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        "affected_versions": []
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    "severity": "unknown",
    "structured": {
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      "aliases": [
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      "affected": [
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              "type": "GIT",
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                {
                  "fixed": "3115fa2f62970d98f2a639145fb8e2767db8bbf9"
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                {
                  "fixed": "7701e68b5072faa03a8f30b4081dc16df9092381"
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          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.18.0"
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                  "fixed": "6.18.27"
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            {
              "type": "ECOSYSTEM",
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                {
                  "fixed": "7.0.4"
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46045.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:46.800079795Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3115fa2f62970d98f2a639145fb8e2767db8bbf9",
        "https://git.kernel.org/stable/c/7701e68b5072faa03a8f30b4081dc16df9092381",
        "https://git.kernel.org/stable/c/98623c7e2a51eab1833c8628d33fa9c6ef3ce325",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46045.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-46045",
        "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-2026-46045.json"
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    "related_cves": [
      {
        "value": "CVE-2026-46045",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 514480,
  "published_at": "2026-05-27T12:57:00.839+00:00"
}