CVE-2026-46045
Full vulnerability record from the local CVENow database.
Description
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.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-05-27 14:17:23.953000
Last modified
2026-11-06 17:17:32.547000
View original CVE JSON
{
"id": "CVE-2026-46045",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-05-27T14:17:23.953",
"lastModified": "2026-11-06T17:17:32.547",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/md-llbitmap: skip reading rdevs that are not in_sync\n\nWhen reading bitmap pages from member disks, the code iterates through\nall rdevs and attempts to read from the first available one. However,\nit only checks for raid_disk assignment and Faulty flag, missing the\nIn_sync flag check.\n\nThis can cause bitmap data to be read from spare disks that are still\nbeing rebuilt and don't have valid bitmap information yet. Reading\nstale or uninitialized bitmap data from such disks can lead to\nincorrect dirty bit tracking, potentially causing data corruption\nduring recovery or normal operation.\n\nAdd the In_sync flag check to ensure bitmap pages are only read from\nfully synchronized member disks that have valid bitmap data."
}
],
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"affectedData": [
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"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/md/md-llbitmap.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
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"versionType": "git",
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"metrics": {
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"type": "Primary",
"cvssData": {
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
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"exploitabilityScore": 1.8,
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"ssvcV203": [
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"id": "CVE-2026-46045",
"options": [
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"role": "CISA Coordinator",
"version": "2.0.3"
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"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-787"
}
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"configurations": [
{
"nodes": [
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"negate": false,
"cpeMatch": [
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